Official Wormy Sites & Clan Leagues:
Official T17 Forums:

W:A Official Site

Clan League 2000

Misc. Worm Sites:
DarkOnes RR Tutorials

HHC's JetPackRacers

Blame The Pixel

triX Worms & Misc.

Worms Tutorial Site!

ThePageOfLight

Dodgymat's Site

Djoszee's Worms Page

Wormy Clans:
Contra Clan

Delicious Revolution

The Fake Clan

Clan GIT

Clan MWC

Pot Smokers United

Clan WCD

Whacky Wild Wormers



If you want your site added here, ask on the SfX boards at CL2K or Email / PM / IM an SfX member. But if your site is a rip or not very good then you are not likely at all to get linked to.
Linking to SFX - Source code & examples:
Note: The following code assumes that you have the sfx_logo.gif file in your "images" directory so please make sure you save one of the SfX images and upload it to your own server space.