The following links will take you to informative web sites with in depth discussions on the rules of curling:

Rules of Play - Copied from the World Curling Federation dated June 2011, plus a changelog showing differences.

United States Curling Association rules booklet (2010-11), copied from the USCA web site:

Mixed Doubles - The newest form of curling in the USCA, consists of one male and one female curler per team.

Skins format - An alternate method of scoring, often considered a more aggressive form of the sport.

Canadian Curling Association rules of play on the CCA web site.

Something only Potomac Curling Club has: Nuclear Curling.