http://www.rci.com
Exchange affiliation called Resort Condominiums International

http://www.Intervalworld.com
Exchange affiliation called Interval Intl.

www.worldmarktheclub.com
WorldMark the Club by Trendwest Resorts.

http://www.timesharing-today.com
An association and network of Timeshare owners.

http://www.tug2.net
Another network of owners.

http://www.timeshares.com
Another good place to find information.