Storage - 8 GB SD Card for the OS, apps, etc. + External SSD (~32 GB) *I will be mounting this to the side of a custom case I plan on building. The ODROID-X comes with 6 USB ports, this will take up one of them.
Case - Custom build (I'm wanting it to house a couple descent case fans for cooling...~60mm each)
PSU - I don't know what sort of power would even be needed for this type of unit...
As for peripherals...Logitech Bluetooth Keyboard/Touchpad Mouse combo I have around here, as well as a bluetooth gaming controller I found online.
The main function of this system will be higher-end Android games/emulators/Gameloft HD Games (like N.O.V.A. 3, Modern COmbat 3, etc.)
That's all I have so far...but I really want to get everything figured out so I can assemble and start testing/benchmarking my Android ICS PC.