I been on a few online dating sites since December of 2007. I have found 4 dates while on the few sites. There are lots of spam and fakes on dating sites, but there are on lots of sites you go on online. After being on for so long, I could tell. When you meet the person from online, first date I bring someone along with me. Well, I am always shy and not talking, plus it's safer, and I always met in public when I found the few boyfriends I dated in 2008.
I have used plentyoffish, okcupid, myspace (it's not a dating site, but have found 2 guys on that site), mingle2 ( though it's not as good as plentyoffish and okcupid).