Modifry just installed a swing arm mount for a laptop to use while he's tuning his gadgets. It's pretty bulky, but it's very adjustable and it seems that there is just enough room for a passenger. Definitely not accident safe for them though. It's not the prettiest solution either, but then again, it's only for tuning while he's driving the car.

Might want to post up in the electronics forum since that's where he spends most of his time.