Twitter's Biz Stone and Evan Williams at D7 [video]

Just in case you can't get enough of Twitter---I'm about to scream 'No Mas!'---the company's co-CEOs Biz Stone and Evan Williams talk about growth, making money (someday) and other nuances of running a startup. 

Here are the video highlights from D7. In other news, Tom Foremski figures Twitter's days are numbered and Ashton Kutcher threatens to stop Twittering. Not sure how I can function today knowing Ashton may leave. Gee, can Ashton completely drop out of the public eye while he's at it?