Windows Mobility center seems to be one of the things they added in Vista which could actually be pretty useful. Unfortunately out of the box it doesn't quite cover all of the things you might want to do with it – in my case, I wanted to toggle Bluetooth on my Macbook to save battery life.
Fortunately other people wanted to do the same thing:
Link: Bluetooth toggle - the second non-OEM Windows Mobility Center tile
Link: Extending the Windows Mobility Center Tile