Towing a U-Haul trailer would be bad news with this car. The enclosed ones are too heavy.
I have a hitch setup for a bike rack. I opted to modify the rear difuser to fit around the hitch, and picked up a spare difuser from another Jetter for when the hitch is off the car.
Works pretty sweet for me, but I'd not want to tow anything, unless it was very light weight (500 - 600lbs). And even then, I wouldn't want to tow it too far.