Via you can see what your weblog is worth compared to other weblogs.

The interesting thing is that weblogs are treated like companies with shares. Based on outgoing and incoming links your value is estimated and people can buy shares for your weblog or sell them. Ofcourse a large community is build around blogshares.

When you register you weblog you get a startcapital for $500,- by which you buy or sell shares for weblogs and to build a portfolio.