My singlespeed is the Karate Monkey with 50mm Rabbit Hole rims. A normal 2.4" on the back and a 3" Surly Knard on the front.
A good mate of mine has the old 1x1 now converted to 27.5" wheels and he also has the Pugsley with a Rohloff hub.
I would love to get myself the Ice-cream Truck but I'll probably settle for re-spraying my frame in the John Deere green and then my rims yellow. :)