DigitalOutbox Episode 219 - Twitter tweaks the timeline and bye bye Ballmer

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1:24 - Twitter now officially says your timeline is more than just tweets from people you follow

10:18 - Steve Ballmer Steps Down From Microsofts Board

11:39 - Online music videos to carry age rating from October, says David Cameron

14:45 - Amazons Whispersync for Voice hits the UK to help you switch between reading and listening to ebooks

18:18 - Mailbox for OS X enters public beta with new features, including snooze to device and Auto Swipe

19:51 - PlayStation Network Suffers DDOS Attack, Hackers Claim To Have Grounded SOE Presidents Plane

Serendipity

- Free

- an online map that displays a stream of coordinates when two users played the same song at the same time. Serendipity isn't live, but is reflective of real-time data recorded recently over a one hour period. As each pair of listeners flashes onto the screen, the song they chose starts playing for a few fleeting moments before another song comes on. Serendipity only displays users who clicked Play within one tenth of a second of each other, Spotify says. The site isn't particularly useful, but is a fantastic visualization of how music spreads — and of the reach of Spotify's user base. It's also just a fun way to hear what the world is listening to.

- Serendipity was built by Kyle McDonald, a Brooklyn-based digital artist who recently became Spotify's first "artist in residence."