Studio KRuM's BLAME!
This is a very nice site with BLAME! translations, art, and extras.

Cyberia Cafe
Nice BLAME! artwork scans here.

BLAME!
BLAME! ASCII art and comics - very amusing!

MHz
They announce Nihei-related things here.
It used to have some strange BLAME! thing with scrolling text,
but I think that's gone now.

Project Omanga
BLAME! translations and others.

BLAME! Net
Official Web Site, although Nihei apparently doesn't have much to do with it.

Heeen's Blame Forum
Awesome BLAME! message board