[oo_jazz_oo]

If you really wanted to, you could just have a link to a web page you have set up, and save that users ip to a database...thats such a simple script, even I could do it...and I only know basic php/mysql.

No matter what, there are always ways to find ips.
When trasnferring files on any instant messenger, your ip is avaiable if you try hard enough to find it.

And I don't know if it would be useful, but using your ip to locate your city or region, and let you know which players are near you...I know a lot of sites that use that...just for fun i guess, so you can see what players live near you.

But, it could also be used for alot of good things...