This is a standard type of thing for a start-up.

They get you to visit the site, sign up, then after however-long-it-darn-well-takes-to-have-a-beta-version, they email you and ask you to hop on board.

I signed up as well. Same deal. But, I knew from the initial screen that was what it was.

Just be patient. They'll update you when they have something to deliver.