The Volokh Conspiracy reported that the radical gay activists in California have posted maps online on where you can find the Prop 8 donors, via Free Republic:
Proposition 8 Donor Maps,
for San Francisco, Salt Lake City, and Orange County, are now posted at EightMaps.com. Proposition 8, of course, was the proposition that amended the California Constitution to bar legal recognition of same-sex marriage. The map is built — presumably automatically — from the data reported by the California Secretary of State’s office. (The site I linked to contains the committee id’s, but if you click on the committee name, you’ll see the individual contributors.) Many of the listed contributions are $50 or below.