There’s a logic to merging all the forums into one GoFar megasite, with road / gnarl / stw / chat as subforums. But other magazines don’t do that, you don’t get Future Publishing’s forums with SFX rubbing shoulders with Edge.
Bikeradar kind of does though, although theirs is more aligned by area and less by mag.
TBH having been over to Grit.cx it all looks a bit grey and uninspired, doubt I’ll ever post there, when here covers a wider rang of cycling.
Worth maybe pointing out that grit.cx is currently blocked by websense, probably as it’s not categorised yet – worth maybe applying to them (I’m assuming they have some way of submitting your new sites to speed things up)