Reply to Controller without a laptop?

A couple of months ago I was looking for a laptop set-up to replace my CD decks. I couldn't find what I was looking for, so I mocked up this design in Photoshop.*There's a single platter for controlling two decks but the main feature is you can play direct from a USB stick so you don't need a laptop. Basically you could play around at home on your laptop, but then just take the USB stick to a party. The single platter makes it a bit more portable too. Anybody know of anything like it around?

I've tried to upload the pic from my iphone but no joy, so here's the URL:

http://i1210.photobucket.com/albums/...o/138861ed.jpg