You've got some passion! I ride my MTB to work here in WI almost every day, but this will be the first year so I don't know if I'll still be doing it in Feb. when it's 0 degrees or not.

Just one thing, though. If you keep it up into the winter (I'm guessing you will!), watch out for ice. A patch of ice will give you a Very Unhappy end to a ride before you have a chance to avoid it. I haven't Quite wiped out yet, but I do know there are a Lot of emergency room trips due to commuters with broken bones around here in the winter. Ice is slick, sometimes unavoidable, and very unforgiving when you go down on it. I'm planning on turning an old set of my MTB tires into studded tires.