What started as a few US hackerspaces having a hackathon the same weekend, has turned into an international synchronous hackathon! Most if not all spaces will be streaming live video this weekend, Nov. 20th-22nd, at various points throughout. So even if you’re not participating it’ll be a prime time to check out some other hackerspaces and possibly interact with them via live chat in #hackerspaces on irc.freednode.net . The following spaces are participating as of the posting of this :
Please see the wiki page for more details/updates, including links to the live streams.