Trading for free on Updown

I just stumbled across this awesome site: updown.com. I've been paper trading for a month now and learned a ton. Here's their ad...
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UpDown.com is a social network for virtual investing where you can

* Trade stocks in a simulated environment. Use $1,000,000 in virtual money to create a stock portfolio and see how your stock picking skills compare to those of other members.
* Be one of thousands to earn real money if you can beat the market or write insightful stock analyses. (The site is still 100% free)
* View and rate the analyses of other members and see which investors are giving the best investing advice
* Create or manage a formal or an informal investment club.

To explore the site, click here.

To become a member now, click here.

If clicking a link above does not work, copy and paste it into the address bar of your browser.

Sincerely,
UpDown.com Team

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Is anyone else using UpDown? what has been your experience? Have you made real money trading there? My user name is tbc32 if you want to add me as a friend.