Idea: Visualize wikipedia trails
A browser extension that watches you surf through Wikipedia, and then generates a pretty graph with some kind of representation for how long you spent on each page. On the other hand, maybe not, because I’m not sure I really want to know where that time just went. It would be a pretty branching tree, though. I should know better than to click through links to Wikipedia — it really doesn’t matter where the link goes. They’re all dangerous. Howstuffworks, too. And if any of the Wikipedia articles link TO Howstuffworks (or visa versa) then it really is hopeless.
And THEN, you get a LOT of people to install it (or Wikipedia to run it on their access logs) and let people surf through the trees starting from some arbitrary page. That would be cool.