I don't see that many registered contestants yet; but I agree, I like it. It is a great concept. I attached the link and sent it to as many people as I have in my email folders. Pass it along, viral marketing is what the company is betting on.
I also see that the company is up to 119,700 registered users. They have been adding 300-400 people per day for the past few months since I have been tracking it.