Twin Talk Bulletin Board
twinstuff.com
Talk about anything from raising twins, to scientific news, conjoined twins, and naming twins.
TWINteresting
twinteresting.com
A twins message board that has forums for discussing multiple births, parenting, breastfeeding, free stuff from companies, and general conversation.
The Triplet Connection Multiples Forum
tripletconnection.org
Forum for parents of twins, triplets, quadruplets, quintuplets, sextuplets, etc.