The UUA website provides The Same-Sex Wedding Guide: A Resource for Same-Sex Couples and Ministers (2004).
Read two articles about historic same-sex wedding ceremonies recently performed by UU ministers:
"U.U. Minister Says Historic "I DO" in Hawaii," UU World Magazine, December 9, 2013
"Michigan UU Ministers Marry 200 Same-Sex Couples," UU World Magazine, March 13,. 2014
Check out the Standing on the Side of Love campaign of the UUA.
Read the February 16, 2003, sermon by The Reverend Anne Felton Hines, Emerson Unitarian Universalist Church, Canoga Park, California, "Love Should Grow Up Like a Wild Iris."