Did a search and came up with http://onegirltwoguys.com - Epic Cash

http://www.realbisexuals.com/tour1.html Manic Cash

http://www.bibilove.com at Pornprofit.com

WegCash has a http://www.bisexuals4free.com - but tour looks like it's one guy, 2 girls

BiCuriosity I couldn't find the webmaster info - this might be the one Basschick mentioned

BiSex Mania XXX Videos webmaster link on front page of tour

I friends and adult friend finder both have bisexual categories - for chat, personals, etc.