Has anyone seen these:
Mattracks.com (http://www.mattracks.com)

These things are crazy looking, I saw them last nite at the Eastern Sports and Outdoors show in Harrisburg, PA on a H2, so I decided to check out there website. These things look like you could do anything with them, but they look expensive.

Yeah, expensive alright, at least $5000 each, and you need 4 of 'em...

I see alot of those up in West Yellowstone around on all the streets that they don't plow. Pretty cool but cost prohibitive for the lay man!!

I've heard they break a lot and are hard to align. Not much beats four wheels driving with chains with a decent driver behind the wheel.