I installed Refer from Textism a few weeks ago, and it’s awfully interesting to see where all your visitors are coming from. Something else I find interesting are entries like this:
This is the referrer of someone monitoring the site in Radio Userland. Userland runs locally on port 5335, and when a user clicks a link, this is the referrer that gets passed. I was awfully interested to find that someone from PeopleSoft is monitoring us via Userland.