Here are some websites I would highly recommend anyone interested in Soay sheep to take a look at.
http://www.britishsoaysheep.com/ An excellent introduction to British Soay, registration, and the Soay Conservationists
http://www.soayfarms.com/index.html Kathie Miller has been breeding British Soay sheep for more than 10 years and has a wealth of experience. Kathie is dedicated to the preservation of British Soays and has successfully used Artificial Insemination to introduce Soay sheep genetics from the UK into her British Soay sheep breeding program.
http://www.rbst.org.uk/ The organization that documents all Soay sheep in the UK and the British Soay sheep in the USA. British Soays must be registered with the RBST to be considered British Soays. (In the UK, all Soays are British Soays, so they don't have to make the distinction in the name)
http://www.soayandboreraysheep.com/ Take a look and see what Soay Sheep look like in their native habitat.[[wysiwyg_imageupload::]]
http://www.albc-usa.org/ The American Livestock Breeds Conservancy works to conserve historic breeds and genetic diversity in livestock.
http://www.nebraskasheep.com/directory/Breeds/Soay/ A listing of livestock breeders by state