The Steampunk community is one of shared knowledge. In that vein, here are some aethernet links that may tickle your medulla oblongata:

Brass Goggles - One of THE best steampunk sites out there.
Steampumk Empire - A nice online community.
Abney Park - Steampunk band that is worth a listen to.

CrabFu - Steam powered robots.
Weta Rayguns - Pricey but amazing weapons of massive destruction.
The Steampunk Home
Datamancer - A wickedly clever man
Steam, Brass and Fzz - A most steamy blog.
Eric Freitas: Amazing clocks
Steampunk Fashion - An excellent resource