This will be my third year keeping track of this, having done so for both 2009 and 2010 previously. In 2009 I saw Jason Kottke do this and liked it, so I decided to do it too.
Once more, one or more nights were spent in each place. Those cities marked with an * were visited multiple times on non-consecutive days
Chevy Chase, MD
Toronto, ON, Canada
I'm down from last year's nine cities, back down to six. Still, an improvement over 2009's list of five.