There are thousands upon thousands of horses up for adoption.  While we understand that some owners breed to keep the lineage up, we don't support breeding for financial gain.  What we do support is adopting horses in need.  The links below will provide you with information on different agencies that are in desperate need of your help.  If you cannot adopt, there are ways to contribute to their cause.

http://www.wildhorseandburro.blm.gov/index.php (US Bureau of Land Management).  There are thousands of horses needing permanent homes.

http://www.nps.gov/asis/naturescience/horses.htm (sponsor a wild horse in Assateague through the National Park Service)

http://www.nps.gov/archive/caha/oc_ponies.htm (sponsorship only for a wild pony from Ocracoke, NC)