That's what I called eHarmony when I gave it a go a few years back. I liked the concept but it suffered from a severe lack of restriction. Perhaps it was because it was still new back then, bugs to work out etc.. but in a year, I got 'hooked up' with ONE gal and we never did make it to actually writing to one another. After they supposedly find someone who matches you, you then must progress through a multitude of steps before you even get to have that persons email addy. I never did.
You'll have better luck with Match.com or Singleme.com or even better, if there is a local singles deal, try that. My local phone company started up a singles deal, I signed up, met the first one and married her last May.