My commute today, and possibly every day from now on, was on my newly converted fixed-gear road bike. An old Motobecane Super Mirage with some doctored parts makes for a lot of fun, even on the hills. I'm riding a 42x16 gear for now, but it seems I have more trouble spinning on the downhills than I do grunting out the uphills, so I may go a little bigger, perhaps a 15 or even 14 on the rear.

Anyway, enough tech talk. Bottom line is that fixed-gear is a blast!