Booting Up: Check-In-Chief Edition

president official portrait hires Booting Up: Check In Chief EditionPresident Obama joins Foursquare. [The Washington Post]

Andrew Ross Sorkin believes Google when they say they aren’t turning into a mobile company – for one thing, the deal was mainly about patents. [NYT]

That massive Steve Jobs biography will be released in November. [NYT]

Twitter allows developers to play with its photo API. [VentureBeat]

San Francisco BART protests continue sans wireless. [AP]