You would certainly have ground clearance issues on a MTB!
Just found this photo on the Transition Bikes blog. I still love the look of this bike and it looks especially cool with this gunmetal grey Crank Brothers wheelset. Lovely.
I'm not a big fan of Wagon Wheelers but even I have to admit that this Sawyer 29'er from Trek is quite nice. Looks more like an off-road cruiser than an MTB with wheels that are too big for it.
Martyn Ashton throwing down some mad skillz normally reserved for MTB's but on a carbon road bike.
Could this be the panacea for all of our HTII woes? As I need a new BB at the moment, I reckon I will be giving one of these a try.