Aslamaolaikum
My experiences on some forums:
Free-minds.orghttp://www.free-minds.org/Quran first. God alone forum. Good all round range of views. Open forum. Traditional arguments also allowed and discussed.
Ya Nabihttp://www.yanabi.com/Anything goes, very traditional and often very direct and crude. Be ready to get lynched by outspoken personalities. But views are allowed.
Sunni Forumhttp://www.sunniforum.com/forum/forum.phpPretty much like the above
MPACUK Forumhttp://forum.mpacuk.org/Quite an open forum with a range of views.
Ourbeacon.comhttp://www.ourbeacon.com/cgi-bin/bbs60x/webbbs_config.plRestrictive, QXP (Dr. Shabbir's rendering of the Quran) only. Anything outside QXP thinking normally disallowed.
A version of the Perwazi School of Thought
Typical ideological beliefs.
(1) Do not believe in ritual salat. Salat is community gatherings / Divine system
(2) Do not believe in Biblical miracles as narrated in the Quran
(3) Do not believe in fasting as commonly understood
(4) Some do not believe in 'dua'.
Salaat Forumhttp://www.salaatforum.com/New forum, seems to be a spin off from the one above. Similar ideological beliefs as above but seems to be more open for discussion.
Saba.