The Stock Market- Sports Style: Protrade

So I was surfing the web for a decent interactive sports site and it looks like I pretty much hit gold. ProTrade calls itself "The Sports Stock Market", which immediately lured me in. I'd always liked fantasy sports but really wanted to participate in a sports stock market and I finally found one.
With ProTrade, you start off with 5000 points to use to buy different players after you register for a free account. With these points (no cash value), you basically buy teams and players in NASCAR, MLB, NHL, PGA, NBA and NCAA. Their value can go up and down basically depending on their performance (Alexander Ovechkin is well over $300 while Casey Janssen is around $50 and you earn or lose money based on this.
So the concept is pretty similar to that of the stock market although quite a bit easier.
However, it only gets better. You also can join challenges that can even give you more points or real live cash or gifts. Plus, if you get enough points, you can redeem them for prizes that include iPods and Amazon gift card. Just one catch, to earn the prizes, you have to be in the U.S. and pay $1-$10 as well as a sum of points.
In addition, you can also create a little profile along with a bit of a blog that you can submit sports opinions, news and stories to. You can also read others' blogs and comment as well.
So it's sports dynamite and a more addictive alternative to fantasy sports.