A Spike forum, with threads for Spuffy, so if you wanted to talk with some more Spike fans or Spuffy shippers, here's the place to go. There's also fans of other Spike ships around.
has a pretty nice selection of goodies in Media - picture galleries, icons, wallpapers, etc.
NOTE: some of the files took quite a while to download. I don't know if it's because they were so large, or because I have a crappy computer