As SVP of Worldwide Digital Media, Kessel oversees the company’s digital strategy, including books, music, video and the Kindle.

“After incredible success leading the Kindle team over the last several years, Steve Kessel decided to take a well-deserved and long-planned-for sabbatical,” said Amazon spokesman Drew Herdener.

Herdener declined to say when Kessel would return, but said that, in the meantime, Dave Limp, who runs the Kindle device business, and Russ Grandinetti, who runs Kindle content, were overseeing the digital business.

Kessel’s absence follows the launch of the Kindle Fire tablet late last year, and comes at a time when Amazon is aggressively pushing into digital content. Just today, founder and CEO Jeff Bezos sent a letter to shareholders, emphasizing how the Kindle is disrupting the book publishing industry.

Some sources I talked to believed that Kessel, 46, was unlikely to return to Amazon and were characterizing his departure as early retirement. Another source pointed to internal documents, which listed Kessel as overseeing Donald Katz, the CEO of Audible, the company’s audiobooks group. However, Amazon’s investor page continues to list Kessel as the SVP of Worldwide digital media, and Herdener said Kessel is not retiring and is not in charge of Audible.

As one of 10 executives who report directly to Bezos, Kessel has worked closely with the visionary founder since 1999. Initially, he served as the VP of U.S. Books, Music, Video and DVD, and then was the VP of digital before landing in his current role.

According to a BusinessWeek article, it was Kessel who conspired with Bezos in 2004 to explore the radical idea of the online retailer making their own hardware.

Over the years, Kessel has been quoted occasionally in press releases, providing updates on how well the Kindle is selling. In October 2010, he said: “It’s still October and we’ve already sold more Kindle devices since launch than we did during the entire fourth quarter of last year—astonishing because the fourth quarter is the busiest time of year on Amazon.”

Amazon has never released specific sales numbers about the Kindle — a secret that has largely stayed under wraps, likely due to the company’s small management team.

Kessel received his bachelor’s degree in Computer Science from Dartmouth College, and an MBA from Stanford’s Graduate School of Business.

What more is there to say, except this viral video of actor Samuel L. Jackson reading a viral “children’s” book is hysterical.

Written by Adam Mansbach, the book has developed a cult following. It’s more for parents than for their children, of course, in the style of “Everyone Poops.”

While some might be offended by it, I have definitely felt this way too many times over the years trying to put my kids to bed.

[UPDATE: Audible requested I remove the original video clip I had embedded here, as it violated its copyright. I did, of course, immediately and then replaced it with their own below. But fair warning: Audible's is shorter and 87 percent less funny.]

Kindle 2′s experimental text-to-speech feature is legal: no copy is made, no derivative work is created, and no performance is being given. Furthermore, we ourselves are a major participant in the professionally narrated audiobooks business through our subsidiaries Audible and Brilliance. We believe text-to-speech will introduce new customers to the convenience of listening to books and thereby grow the professionally narrated audiobooks business. Nevertheless, we strongly believe many rightsholders will be more comfortable with the text-to-speech feature if they are in the driver’s seat.

Therefore, we are modifying our systems so that rightsholders can decide on a title by title basis whether they want text-to-speech enabled or disabled for any particular title. We have already begun to work on the technical changes required to give authors and publishers that choice. With this new level of control, publishers and authors will be able to decide for themselves whether it is in their commercial interests to leave text-to-speech enabled. We believe many will decide that it is.

The move comes on the heels of a meandering New York Times editorial in which Roy Blount Jr., president of the Authors Guild, argued that the Kindle’s roboticized nondramatic book readings are a threat to the audio book market.

Bet you’re thinking about Apple’s (AAPL) iPhone.

I’m actually describing a Windows Mobile device. In fact, any touch-screen Windows Mobile device made in the past couple of years can perform the aforementioned functions — as long as it’s running a new application called Kinoma Play.

This much-needed shot in the arm for Windows Mobile comes from Kinoma Inc. and for $30 can be downloaded onto a computer or directly onto a device from www.kinoma.com. It works on touch and nontouch screens alike, though touch features do add a lot of pizzazz. After installation, Kinoma Play seems to totally take over the device’s multimedia functions, hiding every trace of Windows Mobile’s clunky, antiquated, menu-driven operating system.

Kinoma Play in action, clockwise from top left: a media interface, touch-screen navigation, upload to YouTube, picture rotation, search by characters, and photo zoom.

It smoothly opens and displays all types of media, including photos, videos and music. But it’s also a fast search engine for multimedia content on the phone, on the Web or even on your computer via remote search. Kinoma Play works with services including YouTube, Audible, Flickr, iDisk, Live365, Orb and SHOUTcast. And a section called the Kinoma Guide compiles over 100,000 podcast episodes, radio stations, videos, live television and Webcam clips, panoramas and photos into easy-to-browse categories.

After almost a week with this application, I changed the way I thought about on-the-go Web browsing for media. I forgot about typical browser functions like typing a Web site’s name into a URL bar and instead did plenty of things online with my portable device without deliberately thinking about being online.

Kinoma Play is so well-designed that I wish it could entirely replace the dated Windows Mobile user interface, which still lags behind the iPhone’s. But, alas, it’s about media only. It isn’t designed to supplant, and doesn’t change or improve, any of the phone’s more common functions, like overall email and Web browsing, calendar, contacts or productivity programs.

Kinoma is working on Symbian, Linux and even iPhone versions of its application and will release one of those versions by the end of this year.

I ran into a few problems while using Kinoma Play. On three different occasions using two different devices, my touch screen froze when I tried to start the application, and the only way I could fix the problem was by completely rebooting my device. Once in a while, I experienced slow performance, though this could have been attributed to my network connection. And Kinoma Play lacks a one-step shortcut to its home screen; currently, users must press a “Back” soft key on each screen until they reach the home screen.

But the pluses of Kinoma Play outweighed these hassles, especially considering how enjoyable this application was to use. I tested Kinoma on two Palm (PALM) devices running Windows Mobile: the not-yet-released Treo Pro, which will be available here in the fall for an unlocked, unsubsidized price of $549, and the $250 (after discounts and two-year-contract rebates) Treo 800w available from Sprint (S). Both have touch screens that work best with an included stylus, though a fingernail or fingertip worked for me in most cases.

Upon installation, Kinoma Play automatically scans a device’s media and organizes it into categories under a section called My Media Files. I was especially eager to see how photos were handled, so I started out in the Pictures category.

All Kinoma screens have a set of familiar navigational tools that appear as soft keys at the bottom of the screen; they show up when the bottom section of the screen is touched and disappear when touched again. On the bottom left, a “Back” arrow takes users to the previous screen. On the bottom right, a list-like icon represents what Kinoma calls the Menu Pod. When touched, this pulls up three succinct menus — for media, settings and another action related to the program that’s open.

I opened some photos that were stored on the Palm Treo Pro and touched the center of the screen with my finger. A quick tap on the screen zooms in on each photo, and a small inset of the photo with a box representing the magnified area appears on the lower right of the screen. I dragged this tiny box around in the inset image to change where I was zooming. To zoom in on a photo slowly, I simply touched and held my finger on the screen for a longer period of time. A quick tap after either zooming method will quickly snap the image back to normal view.

I moved from one photo to the next as I do on my iPod Touch: by placing a finger on one edge of the photo and flicking left or right across the screen. Rotating was fun and easy to do when I drew a circle on the photo with my fingertip in the direction that I wanted it to rotate. The image followed whatever motion I drew. To rotate the photo 180 degrees, I drew a larger half-circle.

I selected Flickr from Kinoma Play’s list of services and signed into my Flickr account in just a few steps. My photos and those of friends were just as easy to browse as my own photos, thanks to Kinoma Play’s built-in tools. The Menu Pod icon offered a one-step way to play all photos in slide shows; music could be selected to play in the background.

With a touch on the Menu Pod icon, users can add any media to favorites or to an “on-the-go” list. This same tool also sends multimedia to others via email; I used it to send friends photos of a recent trip to California as well as a YouTube link to video footage of Sen. Joe Biden speaking.

Kinoma makes something out of every action. The Menu Pod button seems to jump into the center of the screen when summoned, and each of its three menus spins like a tiny top to get out of the way so another menu can be seen. Other screens seemed to do a mini back flip as they opened or closed. And long lists seemed to bounce when scrolling reached the top or bottom.

In the Services menu, I used Audible to listen to part of an audio book and listened to rock and country songs on Web radio stations from SHOUTcast and Live365.

I particularly liked using the Kinoma Guide, which is constantly updated with material that streams to your devices when you open it. I found a Restaurant Guys podcast in which chef Cat Cora was interviewed, and even saved it for later listening by downloading this seven-megabyte podcast to my device in one clean step. Kinoma wisely adds all downloads to a special section that’s easy to find. The last 100 things you looked at on Kinoma Play can be found in a section called History.

These days in the tech world, much attention is being paid to applications sold on Apple’s App Store for use with the iPhone or iPod Touch. But Kinoma Play is one application that is desperately needed by Windows Mobile users, and it just might remind them that they can better navigate media-related Web services — without having to buy a new mobile device.

Edited by Walter S. Mossberg

• Email us at mossbergsolution@wsj.com. Find all our columns and videos online free at the All Things Digital Web site: http://walt.allthingsd.com

Shares in the company, which have already lost more than 20% of their value in 2008, slipped further in early trading (but recovered later), though Amazon said yesterday that profits more than doubled in its fourth quarter. “This quarter showed accelerated sales growth and record operating profits,” CEO Jeff Bezos said in a statement released with the earnings. “In our view, these unusual financial results are driven by one thing: continuously improving the customer experience.”

But such enthusiastic pronouncements didn’t matter a whit to jittery investors worried about a slowing economy and Amazon’s tight margins. Shares of the retailer, which closed yesterday at $74.21, fell 8.2% to $68.15 before opening bell today. And they slipped even further, to $66.49, after Amazon announced plans to acquire Audible in a deal valued at about $300 million – a premium of more than 20 percent over the audiobook retailer’s Wednesday closing price.

Perhaps investors haven’t yet realized that Audible controls an astonishing 95% of the online audiobook market and, as Staci Kramer over at paidContent notes, is the top spoken-word provider for Apple’s iTunes Store. Amazon almost certainly plans to distribute Audible content wirelessly via its Kindle e-book reader, which may turn it into the iPod of e-book readers whether Apple CEO Steve Jobs likes it or not. “It doesn’t matter how good or bad the product is, the fact is that people don’t read anymore,” Jobs said recently when asked about the Kindle. “Forty percent of the people in the U.S. read one book or less last year. The whole conception is flawed at the top because people don’t read anymore.”

That may be so, but as Jobs well knows they do listen. Which begs the question: Why didn’t Apple buy Audible? “We have long suspected that Apple would be the party most interested in acquiring Audible, considering the close ties between the two companies,” Richard Fetyko, an analyst with Merriman Curhan Ford, wrote in a research note this morning. “Audible’s audiobook content is sold within Apple’s iTunes online music store, which represents about 25% to 30% of Audible’s revenue. Also, most of Audible’s customers are iPod users. We would not be surprised to see [if] Apple made a bid for Audible to preserve its leadership in online-audio content distribution. There are no alternatives to Audible in the marketplace with any significant scale.”