I think that all communities get a bit insular and think of themselves as the center of the universe. :D Prior to SGA fandom, I really had no idea that LJ fandom even *existed*; my previous fandoms were focused on mailing lists, privately hosted archives and ff.net. Then this whole new world opened up to me, and now when I get into a new fandom, LJ is where I look for fic first. But the rest of the Internet is still out there...