Also, I'm kind of curious about FanLib, which is kind of like FF.net, but with corporate sponsorship. I'm kind of surprised that people haven't seen it/talked about it before, but I can see why it hasn't, since it probably hasn't really touched LJ fandom at all. It's kind of an interesting phenomena, trying to cash in on the YouTube craze, but I don't know if this particular tack will work.
I don't think a lot of the "older" (aka been in fandom longer) writers are really all that into the idea of corporate sponsorship, though obviously, the new ones don't know any better. I mean, it may be able to displace ff.net, though I like ff.net's interface way, way, way better, but I don't think that it will really change the way fandom works on livejournal.