For a message board on Baroque discussions that is well moderated and
has over a hundred discussion threads try

http://groups.msn.com/Classical-ContemporaryMusic/welcome1.msnw

You will need to join if you want to participate in discussions other
wise all messages are available to all.

There are actually 22 messageboards for this group, Baroque being one
of them. There are separate messageboards for Handel and Bach.
There are also photo albums for each messageboard.

Welcome all to Chris Frigon's forum on any and all music from Western
Civilization. There are 22 active message boards on the music of:
21st Century, Live Music, Recordings, American Music, 1945-1999,
Modern, Ancient World, Middle Ages, Renaissance, Baroque, JS Bach,
Handel, Haydn, Mozart, Beethoven, Schubert, Classical, Romanticism,
Brahms, Interpretation and Proportions. Also web pages for
Masterpieces of Music before 1750, Women in Music, and much more.
Over 700 pictures in albums Join us and the variety of our
discussions.

There is also a "Composer's Forum" for those so inclined.

Cheers,
Chris