This is the video I shot (with hand-held Flash camera, someone tweeted about how I managed to keep my hand up for an hour) of one of Twitter's architects, Blaine Cooke, visiting Teacamp, a gathering of Whitehall webbies and hangers on in London. Cooke kindly spent a hour answering questions about Twitter - where it came from, is now and where it's heading to. In other words, lots of insider knowledge Less