Artistic Cycling 
Features an overview of the sport, along with diagrams of the bicycles used, bike specifications, and types of tricks and moves performed.
http://www.cycle-info.bpaj.or.jp/english/ride/ff.htmlUCI: Indoor Cycling
Explains both cycleball and artistic cycling, features an events calendar, including World Championships. Offers an archive of results of past championships and photos.
http://www.uci.ch/english/indoor/
Indoor Cycling in Hong Kong
Features results of recent championships, training schedule, details on the Artistic Star Award Scheme presented by the Hong Kong Cycling Association, photo gallery, and links. [English, Chinese]
http://www.hk-icycling.net/
Wikipedia: Indoor Cycling
An explanation and introduction to spinning.
http://en.wikipedia.org/wiki/Spinning_%28cycling%29
