Suppress Plug and Play UI
Microsoft just released a new hotfix that allows you to suppress the plug and play UI in Windows XP and Server 2003: http://support.microsoft.com/kb/938596. I haven’t played with it yet, but it sounds like it has potential when deploying new systems using ConfigMgr or MDT. Sometimes, there’s that one device you either don’t care about or can’t find a driver for that just pops up over and over again but doesn't change anything on the system. Or, if your users don’t have local admin privileges (which they shouldn’t), if a new device is available on the system, you can now hide the UI. Not sure of all the useful scenarios, but definitely some potential.