The RUB BBQ Chopper, built by Orange County Choppers, would come in handy when you're in the mood of brisket, but don't want to stop riding. It's fully functional, and you can view pics of it in action at the link.
Before a flame war starts in the comments: yes, the headline identifies this object as a grill. That's what we call these things in south Texas. Real barbecue pits are made of brick.
http://www.meninaprons.net/archives/2007/08/rub_chopper_in_action.html via Make | Photo: Men in Aprons
Update 5/31/10 by Alex: Don't forget our Top 10 Coolest BBQ Grills (And Then Some!) post