Two local sites of note:
Wide Right Turn "This is a tiny little site focused on the variation in the signs placed on the right rear of most trucks we see on the roads.... Simple idea. Many ways to express it. God bless us all." That killed me. By EveryBlock co-founder Daniel X. O'Neil.
BLUEPRINT: Chicago By a CAF docent. If I haven't mentioned this site before, I should have, and if so am embarrassed that Gapers Block beat me to it. Favorite post so far: on Harry Weese's River Cottages, mostly because I want to live in one.