I'd love to do something like this in London. Inspired by the manual, I've created a signup page at hackerschoollondon.launchrock.com Perhaps we can get one going here if there's some interest.

n.b. Hacker School have asked me to stop using their name - I don't mean to mislead or imply any affiliation with them. I'll change it shortly. But I do want to copy the idea :)