This from the UUSC webpage:
UUSC is accepting donations to provide aid to the people affected by the January 2010 earthquake in Haiti. If you would like to donate by check, please make it payable to "UUSC/UUA Haiti Earthquake Relief Fund" and mail it to UUSC, P.O. Box 844001, Boston, MA 02284-4001.
If you wish to donate online, go to <https://secure2.convio.net/uusc/site/Donation2?df_id=1720&1720.donation=form1>.