Stamps Home Page has a listingof Philatelic societies accessible via computer.
Gay and Lesbian History on Stamps is the homepage of a club that is dedicated to the collection, study, and dissemination of philatelic material depicting any aspect of gay and lesbian history.
CoolStamps has many stamps for sale, and allows you to view them online.
DMS Stamps has information on many stamps, especially rare ones.
Stamp Collecting for Beginners is just what it says it is.
Netstamps is an internet magazine for stamp collectors.