Another option is to run a program on the web server log files.
Have a look at Google Analytics
If your visitor is like me, FF+NoScript are configured to deny Google Analytics (as well as *.doubleclick.net and others of their ilk). Your logs will give you a much
better indication of your visitors without requiring the user to allow JS from other sites.
My attitude on this is that if you want to track me as a visitor that is fine. If others wish to base their income model on something that does not benefit me, they have to stand in line. Therefore, if your site will not allow me to navigate without
sending data to external (to your company) sites, you better have something I can't live without.
Just my $0.01 (exchange rate is going to heck) ;-)