Check out this amazing Xbox Elite mod, from Ben Heck, it comes with a cool design and some interesting features.
This portable Xbox 360 Elite features a Halo 3 Theme, and is built from the internals of the Xbox Elite.
There is a 120GB hard drive, the new 65nm CPU and a special DMI to DVI connection.
It also features a built in Xbox Live camera and Wi-Fi, check out this video of it in action.
I have to say this is one of the most amazing mods I have seen.