According to the Twitter site, the service is "A global community of friends and strangers answering one simple question: What are you doing?"
Seriously, we need this?? I mean, people don't even bother answering that question on the phone...
"Hey, man, what are you up to?"
"Not much. You?"
"Same old. You wanna come over and watch the game?"
But wait, the worst part is...there are more similar services!
This is exactly the type of crap that caused Bubble 1.0 - technical solutions in search of a problem.
For now, this is a project funded by Odeo (the company also came up with the "idea"). If the day comes that a VC funds this..be afraid, be very afraid.