Cosmic Wimpout

Bear Creek Rules
Popular rule variations compiled by Mark Wiening.
http://www.wiening.net/wimpout.html

Cosmic Wimpout Official Site
Contains official rules, house rules, and some historical anecdotes. Also features an online catalog.
http://www.cosmicwimpout.com/

CWimp
A multiplayer version of the game for your PalmOS handheld. Released under the GPL license.
http://docwhat.gerf.org/projects/cwimp/

Review from Gamers Haven
Reviewed by Doug Smith. Rating: 4/5. "It's cheap and fun. It is also one of those games that non gamers can enjoy."
http://www.elsewhere.org/cw/gh_rev/