Useful Off-Site Resources:

The Real Folk Blues: a very good resource on the episodes, the music, and a lot of the setting. Has some nice screen grabs and some close observations.

s.e.e y.o.u. s.p.a.c.e. c.o.w.b.o.y: the person who made this site obviously has a lot of the extra material, books and what not. There's a lot of "extra" information here that can be useful. (No longer active)

Official Cowboy Bebop Website: Ever since the original Bandai site closed, this is as close as we can get to actual official information. It's still a really good site even though the english side is only half done.