I've looked at studded snow tires before; only once did I see a price I could afford to pay, and that was about the time I broke my collarbone, so they had to wait. When I went back to look them up again, couldn't find 'em -- don't even remember now what brand they were!

Last winter was the only real issue I've had with the surface conditions, and I started commuting in 2000. (Boy, do I remember that winter -- on a friggin' rigid Huffy, rolling up and over frozen banks of plowed snow... it was like I was 15 again!)