Well for gay mainstream, a good portion of my sales come from amazon.com at my gay mainstream site of course.

Runner ups would be undergear.com, followed by 10percent.com

Oh but at the top of the list for me would be dating site referals. The ones that are tops are gay.com and glimpse.com

*rant* I was going to try out Yahoo! personals but my site was too gay and canadian for them -- never mind that most of my traffic is not canadian; besides which they have a lot of banners aimed at canadians and gay & lesbian ppl. go figure... *end rant*