How Many Users Does Tumblr Really Have?

Yahoo says it acquired 300 million new users yesterday. But, for now, the number advertisers care about will be much smaller.
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Why Yahoo Doesn’t Think Tumblr Has a Porn Problem

Does Tumblr host a lot of pictures of naked people? Yep. But they’ve got an ad plan that deals with that.
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Time Machine! Tumblr’s David Karp in 2007, Age 21.

Back when he was 21, had 75,000 users and was raising $750,000.
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Microsoft’s Anti-Google Campaign Gets a Boost, From Google

Google tells Microsoft to turn off a home-grown YouTube app. Microsoft couldn’t be happier.
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SoundCloud Starts Pushing Its Own Native Ads Out of a New York Outpost

Audio is good. Audio plus visual: Better.
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Dick Costolo Tweets Out His University of Michigan Commencement Speech

Of course he did! It’s pretty good, too: Fail whales, Second City and Keebler elves.
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Spotify Takes a Page From the Twitter Playbook, Buys Music Discovery App Tunigo

Lots of tracks out there. Who’s going to help you find the ones you want to hear?
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News Byte

Twitter Starts Selling Self-Serve Ads to Everyone

A year after launching its self-serve ad platform, Twitter has opened up the service to the general public. The goal: Help the company create its own version of Google’s powerful AdWords product, in time for an upcoming IPO.

Twitter Gets a Vote of Confidence — And a Big Check — From Madison Avenue

“Hundreds of millions” from Starcom is nice. But the official stamp of approval from an ad heavyweight could be worth more: “Twitter will be part of every evaluation and buying decision.”
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FTV, Elevation Put $38 Million Into Advertising Dashboard MarketShare

The company that helps direct $50 billion in ad spending has more cash for itself.
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Twitter Music Is Here Today, and This Time You Can Use It

Twitter Tries to Make Its Ad Pitch More Googley, With Keyword Targeting

Twitter’s New Video Plan: Ads, Brought to You by Ads

Twitter Music Is Here Today, and You Can’t Use It

Foursquare’s Dennis Crowley on Growth, Data and His New Money (Q&A)

Big Media Loves Promoted Trends, Twitter’s Big-Dollar Digital Billboards

Tweet Any Good Books Lately?

Play Ball! Free MLB Streams On Twitter, Facebook (And AllThingsD).

Big Media Flexes Its Muscle, and Justin Timberlake Sells a Lot of Music

BBC Weather Forecast Calls for Hacked Twitter Account

Small Business Web Ad Dollars: Still Way Too Small