We certainly wanted to. But we had to find, and geocode, addresses for over 300,000 users in the United States alone so that people would have the best shot at finding realistic matches.
With the live site will come real people signing up, wherever they are in the world.
We're not sure. We're looking into the issue, although we haven't be able to recreate it. If your signup fails, please try again. The member portion of the site works just fine, and your error might have just been a fluke.