VisitorSpy - Watching Your Site's Visitors

Worth a look - especially as there's a free account option:

http://www.visitorspy.com/?free-download=8530
in reference to: VisitorSpy.com | Free Web Site Tracking and Analytics | Matt Callen (view on Google Sidewiki)

There's a quick little demo on the main page - it basically records the actions of any visitor; and they actually show you a video of it!