PWP = Porn without Plot, or Plot, what, Plot? Basically a story which has the sole purpose of sexytimes.

And as far as archives...yes I suppose NoLimits would be the main one, but I don't think that's the only place to go. I know I don't put most of my stuff up there because I'm lazy (lol) and I'm not sure if Aldi or Lil does either, though I know they have some stuff up there. So I imagine not everyone archives there. You could also check out seifen_slash on LJ for more fic. There's been a couple short ones recently from someone who's just started the storyline that I really liked!

I don't know of any central fanvid place either unfortunately. :/