Nice, years ago I used to enjoy playing with Blogshares. I also started coding something similar to this years ago, while I was wondering how one could make money from it. I toyed with the idea of a virtual currency which would be a share in the total real money value market, adjusting upwards and downwards based on your share performance. I think the main issue against this is that it's not like trading on a market, it's making a bet and this could probably be considered a form of gambling.