Roboforge
The official roboforge website.

The BogzDollox Site
Great Interviews and good tutorials.

Slow Slosh's FAQ
Everything you ever wanted know about world variables but were afraid to ask.

Dewstation
Good source of RF info

Ace Uplink
Another good source of RF info

Plastic Revolution
Mister Bucket's site

Robofreaks Unofficial Tourney Page
The Clan page for the Robofreaks