I met my wife through frumster.com. We both had had terrible luck with shadchanim. After corresponding through frumster through five weeks we finally met in person. We got engaged on our second in-person date, and we remain happily married 5 1/2 years later.
One of the great advantages of frumster is that it creates dating opportunites for people who live in smaller communities. My wife and I were in different cities and we might never had met had it not been for frumster. As you might guess, I enthusiastically endorse it.