Check out the entry for env-econ on Blogshares. Here is a description of Blogshares:
BlogShares is a fantasy stock market where weblogs are the companies. Players invest fictional dollars on shares in blogs. Blogs are valued by their incoming links and add value to other blogs by linking to them. Prices can go up or down based on trading and the underlying value of the blog. No actual ownership of blogs is transfered. BlogShares is purely a fictional marketplace.
This looks fun. Our current market valuation is B$65,520.04 and in the economics sub-industry we're ranked 39th out of 198 blogs. That is, if the list is a ranking. Our price to earnings ratio looks to be about the lowest in the entire list. [Can anyone explain all this to me?]