If I'm not mistaken (and I could well be), back when AH was beta, there was a drivable Jeep with a single 50 mounted in the back. I spent 15 mins racing across the ground then turning violently to tumble a few times, explode, rinse repeat. Man, that's been a looooong time ago. I'm pretty sure it was an AH beta, but it was definitely in a ww2 sim demo of some sort.
Even though it would be mostly useless, maybe it could carry a few supplies, or an attached gunner could bail out (jump off?) and go beat the crap out of the guy hiding in the map room.
I vote 'yes'