Hey I wanted to let you guys know that for now I'm discontinuing research on FBJS2. Basically at this time instead we're focusing on Facebook Connect (external sites, not embedded on Facebook) and the overall stability of Facebook Platform (that is, not introducing wild new technologies that will break everything). Meanwhile I'm moving on to some other projects at Facebook. It's probably for the best since I never did get to commit as much time to FBJS2 as I had wanted to; it was always kind of a rogue project I was working on in my spare time.
The good news is that we're open sourcing everything we made along the way [Apache license]...