Thanks guys, it's handy to have something to get the snow out of the driveway since my snow blower died last season and I hated wrestling with it trying to move wet heavy stuff.
Gary, the weather guy here said tomorrow we will get more wet snow then freezing rain and sleet, all stuff the M can handle better than the blower ever could.
Good that you stirred and warmed the coolant

with the temps that low running them until fully warmed is a good thing.
Sotven, M37 at work pix were lacking this year since I was working alone and the folks that owned the property being cleared were more intrested in seeing bare pavement than taking truck in action shots for me, but here are some from last year:
http://outdoors.webshots.com/album/576002585Znpazi
Bob, having your truck under wraps "cold storage" is better than starting it then not allowing it to fully warm like I have seen some owners do who think just starting and running only a short time is better than sitting cold. I believe in "don't start it if you are not going to drive it until it's operating temp".
Carter