Khosla, a legendary venture capitalist and one of the most active investors in cleantech through his firm Khosla Ventures, said some of the books that have helped generate buzz were “probably written by English majors who could not get a real job,” he said onstage at the AlwaysOn Summit at Stanford University.

The industry is far more scientifically dense and difficult to predict than many seem to believe, he said, so almost everything being about cleantech today should be taken with a grain of salt.

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Brand new MySpace CEO Owen Van Natta started things off Monday with his first day on the job. He was joined by new COO and former AOL exec Mike Jones and new chief product officer and former Sling Media exec Jason Hirschhorn. Down in Los Angeles at the AlwaysOn OnHollywood conference, Boomtown ran smack into Huff Post mastermind Arianna Huffington, who extolled the virtues and abilities of new managing editor Jai Singh, former editor-in-chief of CNET Networks. At AOL, in preparation for spinning off the Time Warner (TWX) Online unit, new CEO Tim Armstrong began appointing new senior execs and spinning off existing ones. Platform-A president and former Yahoo (YHOO) sales exec Greg Coleman, who joined the AOL team in February, is leaving the company, to be replaced by Jeff Levick, who is leaving Google (GOOG)–where he had a close relationship with Armstrong. CFO Nisha Kumar is also leaving AOL, and a search is underway for her replacement. MediaMemo has more on Time Warner’s decision to spin off AOL. A number of Flickr engineers were laid off Wednesday, but Chief Architect Cal Henderson has left the company of his own accord and is working on a stealth start-up with Flickr co-founder Stewart Butterfield. Last, but not least, one of the voices covering the digital scene has found a new gig. Owen Thomas, self-described “scourge of [Silicon] Valley,” is leaving Valleywag to head up GE (GE) unit NBC Universal’s new “Bay Area” Web site, whose motto is “Locals Only.” He’ll be replaced by fresh-faced Ryan Tate, recently the night editor for Gawker. Both reporters talked to BoomTown on Friday about the changes.

MediaMemo wrote on Monday about Condé Nast shutting down Portfolio–both the print magazine and the accompanying Web site. On a cautionary note, MM outlined the reasons why Portfolio’s business magazine peers should not celebrate the loss of a competitor, even (or especially) during tough economic times. Is the meteoric ascension of Twitter flattening out? According to a Nielsen Online study, 60 percent of Twitter’s users leave after a month. This was met with a lot of skepticism so Nielsen ran the numbers again with the same results–and this time it’s sticking with them. MediaMemo also had an explanation for why the long-awaited deal between Disney (DIS) and Hulu took months and months and millions of dollars to finally come together. Digital Daily had more on that story.

Digital Daily also had more info on the ever-evolving Palm (PALM) Pre story. First, a rumor that Palm plans to launch the handset on June 7–which would be crazy, given the fact that June 8 is both the first day of Apple’s (AAPL) Worldwide Developers Conference and the day that those in the know expect the next-generation iPhone to drop. Then, there’s an assertion by Collins Stewart analyst Ashok Kumar based on supply chain research that Palm has greatly reduced its production numbers. Time will have to tell, though, because Palm certainly isn’t talking yet. Of course, things could be worse. Dell (DELL) hasn’t even solidified plans for its rumored smartphone, and already, no one really cares.

Dell’s new Adamo laptop and Studio One 19 desktop aren’t causing much excitement either. In this week’s Personal Technology column, Walt Mossberg reports that although both machines look good and function well, neither is groundbreaking. In Mossberg’s Mailbox, Walt answered readers’ questions about improving performance on a PC, using peripheral devices with an iPhone and installing Apple’s OS X on a Windows machine. And in this week’s Mossberg Solution, Katie Boehret tested three apps from the iTunes App Store that make it possible for the iPod touch to function like an iPhone.

More next week.

Yesterday, I moderated a panel at AlwaysOn’s Venture Summit East in Boston, called “Is There Still Upside in the Internet?”

Short answer: Always and forever, as long as there are venture capitalists with bags of other people’s money and enough rat holes to shove the cash down!

In all seriousness, it was a great discussion, centering on the lack of exit for start-ups via IPO, the slowing down of the M&A scene and a need to build businesses that have strong revenue outlooks.

As to hype? Social networking, of course! And underhyped? Mobile.

The panelists included: David Kidder, CEO, Clickable; Waikit Lau, Co-Founder, ScanScout; Bob Davis, General Partner, Highland Capital Partners; David Beisel, VP, Venrock; and, one of my personal favorite VCs and charmingest Yahoo (YHOO) board member, Eric Hippeau, Managing Director, Softbank Capital.

I gave Hippeau a teeny hard time about the MicroHoo situation (essentially, WTF!!?). He deftly ignored me and made the most salient point of the panel about the continuing transformative power of the Web.

(Thus, shaming me for my tiny-minded, here-and-now focus! Well, I was only ashamed just for a second, but it was a really long second!)

Here’s the video with interviews with Hippeau and others, including conference organizer Tony Perkins:

Of course, I redubbed it: “Has the Internet Jumped the Shark?” For the love of All Things Fonzie, you bet it has.

The discussion centered around what I think most agree is an inflated market for start-ups, worrisome especially given a looming recession.

Here is my video and one from the panel, in this case a snippet of Benchmark Capital’s Bill Gurley talking about Second Life, in which he is an investor:

Interestingly, none of the panelists–Gurley, Glam CEO Samir Arora, Lise Buyer of Class V Group and Aggregate Knowledge CEO Paul Martino–seemed bothered by that for a variety of reasons (lots of bigger companies interested in acquiring little ones, for example).

I am a little less okay with the rampant frothiness, insane valuations and who-cares mentality, which has seeped into the market and can only result in lack of discipline and too many me-too companies.

While–thankfully–the weak IPO market is protecting the investing public from the insanity this time around (no Pets.com!), it’s still not a good thing for the industry to see too many companies without solid paths to profitability being formed with the hope of some pie-in-the-sky idea that endlesss advertising revenues will support the whole rickety enterprise.

But that’s just me.