Really cool: Crestron
Really cool AND affordable: http://www.audioholics.com/productreviews/avhardware/WirelessRFRemoteControlExtender.php
I would go with a Logitech Harmony universal remote and the above product if I were to go RF right now.
IR repeater systems also work nicely and don't lock you into a single remote.
Don't forget: If you are putting all your gear into a closed cabinet, be darn sure you are properly ventilating your gear. #1 reason for product failure that I have seen is people putting their stuff into un-vented cabinetry. The gear fries itself.
- Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.