I'm a little slow: Wasn't this site supposed to shut down? I went to it and it still seems operational.
Betting is disabled. The site is still up to allow people to withdraw their coins.
Would you believe there are still several hundred BTC awaiting their owners?
I guess many of these BTC have their private keys lost. Nobody ever knows the percentage of actually destroyed bitcoins due to negligence. It's not only the sum that was invested in it's peak, there was certainly some investing/divesting cycles going on so the total sum turned around by the investors is probably > 10.000 BTC. Few percents of BTC being carelessly handled is to be expected.