Have you ever needed to Remote Desktop into a computer and have the console stay active? Or just have two people logged into a Windows Xp box at the same time? Well there is a hack that uses some code from a beta release of SP2 that will allow you to do just that. The web site below has a pretty good step by step on how to do it. If your computer is on a domain, scroll to the bottom and read the comments to figure out a way around the fast user switching problem. Basically you have to redo a few things every time you login using a batch file.
The same site now has an install for Unlimited connections of Remote Desktop!