Email Group for Mathematica Users (MathGroup)
Summary: MathGroup is a moderated electronic mail list, not a list server.
This avoids flame wars and trivial questions that plague net
newsgroups. Members of the group post their questions to the
mailing list and usually receive rapid and expert help with their
Mathematica questions. Many of the leading experts on Mathematica
inside and outside of Wolfram Research read and respond to user
comments and problems.
Web Site: http://smc.vnet.net/MathGroup.html
Archive Site: http://forums.wolfram.com/mathgroup/search/