www.ukworkshop.co.uk/forums

The best British forum by far (JN).

www.woodworkforums.com

Australian site 2nd best forum on the web (JN).

www.woodworkersinstitute.com/forum

This one is run by woodturning mag, slow but getting there (JN).

www.woodturnersresource.com

American site with some info (JN).

lumberjocks.com/forums

American site with some info (JN).

www.penturners.org

The definitive pen making resource with massive library (JN).

www.aawforum.org

The American Association of Woodturners, a quite informative site featuring some really spectacular turning (DLA).

americanwoodworker.com

Mainly woodworking site but does have some interesting items (DLA).

www.turningtools.co.uk/index.html

Site with lots of useful turning items (DLA)

www.woodturnersresource.com/cgi-bin/yabb2/YaBB.pl

Various woodturning message boards (DLA).