Hey JD,
I actually dropped the keyboard totally from the design, to do any admin work I use VNC from another computer, and do all the admin work on it remotely, through a wireless network, I may get a wireless keyboard (19.99) at my local computer shop down the road.
There is no additional support under the CP, everything under the CP is as is in the plans, but i did add additional support under the Monitor/TV area, as the TV I'm using is really heavy. I also framed the whole cabinet with 2 x 2 and screwed everything into that, instead of the MDF, the CP box I designed myself, the top of the CP is from a Visio diagram floating around somewhere, I can post specs, and dimensions on it later.