Why when I access an aspx (e.g., http://www.example.com/foo.aspx - not the real site) through IE6 would I get a 404 Error (i.e., \"The page cannot be found\") in IIS6
Check that www.example.com is going to the site that you think it is.
If you are hosting multiple sites on the same IP using host headers you may want to double check the name you are using is going to the site you think it is.