Hey guys, i've been planning my carpc for quite sometime now and I thought i'd share with you guys what i'm planning to use as mouse and keyboard. Maybe others would like to use this same setup for a compact and wireless solution

Wireless PS2 Controller ($20 at pricegrabber)
MadCatz Thumbpad (mp3car store $30)
PSX PS2 to PC usb adapter (ebay only $7 including shipping)
Xpadder Gamepad Program (free!! via http://xpadder.com/)

Connect the PSX usb adapter to the computer
Attach the wireless ps2 and Thumbpad into the adapter
Setup the controls with xpadder (in my case i used the ps2 joystick for mouse movements and the "x" and "o" for left and right click)