Internet Trackbacks

People discover some weird shit on the internet [imagine link to something really weird]. Don't you always wonder how they found it?

Imagine if you had a Firefox extension for Google Reader or e-mailed links that showed the person reading what you sent them the history of the previous sites (3? 5?) that you visited before you got to the weird shit in question? That would be cool, right? Browsing history is easily accessible, now all we need is a programmer (Tom?) and a cool way to visualize this graphically. This won't be good for everything you find on the internet, but I bet there are some great paths out there, especially in the classic Wikipedia vortex situation (e.g. where you go from Object-Oriented Programming to Adolf Hitler to Last meal in fewer than 10 clicks).