I'm curious, why'd you rule out the Pugsley? I love mine with the full fats and the 29+ wheels (as do others that I know).If you've got money to burn, the Borealis Echo sounds pretty sweet, Twenty Nine Inches.com recently reviewed it with 29+ wheels.Apparently the 29+ tire clearance on Mukluks can be a bit tight without custom dropouts.
I was not aware you could run 29+ with the offset of the pugs. What width 29er rims do you need to run to make the offset work? I would assume that the increased offset of the Moonlander would exceed what you want for offset on 29+?