… and others 🙂
When you sign up you are given $10000 in virtual money to invest in various concepts. You invest that money in various commodities (Browsers, IM clients, Linux distros, operating systems, etc). The price adjusts based on popularity. Popularity or buzz is measured by Yahoo! Search frequency over time.
Currently I’m invested in the following: GOOGAD, LINUX, SPAMASSASSIN, WORDPRESS, FFOX, GAIM, & JAVA.
As of right now, I’m up more than $2600 🙂