Doing a background check on yourself

The Consumerist has a good collection of links on how to run a background check on yourself.
The usual suspects are there, the three credit reporting agencies.  There are also a number of surprising places where information about your is warehoused, such as :

• The Retail Exchange (tracks your return activity with retailers)
• A number of sites keeping employment history
• A number of sites keeping tenant history 

someone is always watching