Button Men

Beat People Up
Official fan site with rules, in-depth strategy, complete button lists and a current events page.
http://www.buttonmen.dhs.org/

Johnson, Hunter - Bruno! Button Men
Publisher of the Bruno! expansion of Button Men. Currently features four different characters drawn by Dan Smith and introduces the Berserk die type. Links to other Button Men sites are featured, as well as links to other gaming sites.
http://www.hunterandlori.com/Bruno.html

Stone Press
Publishers of the Renaissance expansion of Button Men. Currently features a single Button Man, Guillermo, and links to related sites.
http://members.aol.com/bfogartyjr/

Warp Zone
Includes all the rules on Special Dice and a complete roster of all available Button Men.
http://www.randomdice.com/games/buttonmen/