mph88888 - 7:36 am on Dec 12, 2003 (gmt 0)

>> I can't imagine trying to tie cookies and ip/user agents together and then making sure there is no cookie present for my IP/user agents... >>

Good point cfx11. Double counting of visitors is something that hasn't been addressed very much in this thread. Even if you find a way to squeeze out that last 5% of accuracy in your web stats, what about those people like me who have both a home and work computer? I'm sure that BBC.co.uk sees me at 2 different unique visitors (assuming they even track visitors). For online banking and hotmail it's not a problem as I am required to log in from both locations, but what about non-login/registration sites? I'd be interested to see if anyone out there has estimates on the number of *unique* visitors who are actually double-counted in this way.

Mike