The American Family Association has posted a one-question survey about whether you'd be more, less, or equally likely to do business with a corporation that "supports the homosexual agenda". Please respond and show them that not all Americans are homophobic bigots. And pass it on.
http://www.afa.net/petitions/businesses/businesses.asp
Edit 4/25 (also posted on comments below): A follow-up from the mailing list where I first found this link suggests that the whole survey is just a ploy to get more people on their mailing list and ask for more funding based on those numbers. And the poster said the numbers weren't updated all yesterday afternoon either. Well, I still don't regret posting this link, as spreading the word brings their tactics more to people's attention, regardless of the survey "results".