The question pretty much says it.  Beyond knowing people that are interested in the same things, is there a collaborative reversing dumping ground for documenting specifically disassembly of closed source firmware?
Is there a collaborative reversing forum for people that deal with firmware?
decompilation;disassembly;firmware
I am not aware of a currently active generic firmware reversing forum.A few years ago there was a pretty ambitious attempt with lostscrews.com but unfortunately it languished due to lack of attention, got overwhelmed with spam and eventually the domain has expired. I think the guys behind the /dev/ttyS0 blog also tried opening a forum a couple months ago but it wasn't very active and apparently has been closed down.I guess the problem is that the area is somewhat nebulous and trying to cover everything won't really work. However, there are numerous forums that specialize in a specific type of firmware, manufacturer, or even just one product, and some of them are pretty big on their own. Here's a few examples that come to mind:XDA Developers: everything about hacking Android and Windows Mobile-based phones and other devices.PC BIOS hacking: Wim's BIOS and My Digital Life.Samsung TVs: SamyGO TV.Digital cameras: CHDK, Magic Lantern, Nikon Hacker.Ebook readers: MobileReadAudio players: RockboxWireless routers: too many to list here.iPhone/iPod/iPad: iDroid Project (and many others)and so on.