Þa Engliscan Gesiþas - web page for a society of people interested in Anglo-Saxon Culture.  If you join up, you get a mail-based Old English course
Regia Anglorum - Society of people who wish to accurately recreate and re-enact the Anglo-Saxon lifestyle.
Geforðian Strand - the American branch of Regia Anglorum, with the same goal as Regia.