I rode around last night at about 2am in about an inch or so of snow just for fun, i got a new track wheel set yesterday and it was great flying through the fluff.
I also rode home through the big snow in Chicago, mostly taking main routes. I did take one side road for about 7 blocks, and they only plowed the cross streets, leaving a wall of snow into the interesection about a foot and a half high. I nearly ate it cause i thought i could power through.