Those are the top ten, but there are others: DateHookUp, OKCupid, dating for married people, Jewish people, Muslims, etc, etc.
My e-mail keeps getting spammed by eHarmony (not interested...I have a girlfriend who also happens to be my wife) and I am always seeing ads on TV for dating services, so I had a brilliant idea. How about a dating service for chess players? Alas! Somebody beat me to it. There's already a site in Great Britain. Can you believe it? Anyway, as a public service announcement for anybody that’s interested, here you go: Chess Lover Dating!