I was going to post this at Dev Shed, but I figured out that we probably have a lot of really smart people here, too. Does anybody have a clue on how to figure

I was going to post this at Dev Shed, but I figured out that we probably have a lot of really smart people here, too. Does anybody have a clue on how to figure out where a user went to after they left your site; basically a way to figure out the user's exit page?