Atlas F1 Bulletin Board - Large, active message boards on all things F1. - http://forums.autosport.com/
Global F1 - Discussion about Formula One's past and present. - http://www.globalf1.net/
The Chequered Blag - Message board for F1 fans. Also includes a few videos and photos, and related links to news and team sites. - http://www.thechequeredblag.com/
Proboards Formula1 - Discussion group debating all things F1. Analyzing past, present, teams and technology. - http://formula1.proboards10.com/