UUS-L Mailing List FAQ and Archive 
Here's information about UUS-L, the oldest UU discussion mailing list. Although frequently contentious, and a skewed intro to UUism, UUS-L is a great place for the thick-skinned to debate UU-related topics.
http://www.iecc.com/uus-l/The soc.religion.unitarian-univ Newsgroup 
This site describes soc.religion.unitarian-univ, the Unitarian Universalist Usenet newsgroup. (See also alt.religion.unitarian-univ, the unmoderated newsgroup.)
http://sruu.iecc.com/
Unitarian-Transcendentalists 
An online discussion group.
http://www.geocities.com/unitariantranscendentalists/
Conservative Forum for UU's 
For Conservative and Libertarian UU's and those of other political views who wish to engage in friendly, spirited debate.
http://www.cfuu.org/CFUUForum/
USENET FAQ - soc.religion.unitarian-univ 
Information on the Usenet newsgroup, soc.religion.unitarian-univ
http://www.faqs.org/faqs/unitarian-universalism/newsgroup-faq/
Apokatastasis: Christian Universal Reconciliation 
Discussion group for believers in universal reconciliation.
http://groups.yahoo.com/group/apokatastasis/?yguid=118141322
American Unitarian Conference Discussion Forum 
A place for discussion of topics of interest to members and friends of the American Unitarian Conference.
http://www.americanunitarian.org/forum/
Unitarian Universalists Journal 
A LiveJournal community, also known as "chalice circle," for open conversation among Unitarian Universalists and others who are interested in discussing Unitarian Universalism.
http://community.livejournal.com/chalice_circle
The International Unofficial Unitarian Jihad 
A LiveJournal community, formed in response to a humorous article by columnist Jon Carroll, that consists of Unitarian Universalists and like-minded people who are interested in social issues, activism, and humor.
http://community.livejournal.com/unitarian_jihad