Chickens in the City

Did you know some cities allow chickens in the city, or some just don't have a law against it (NYC, for example)!

If you're in Fargo, fresh eggs could be awaiting you in your backyard.  (ordinances, see article 12-03)  With fair restrictions, they shouldn't be a bother to the neighborhood either.

What cities and towns have you heard of that allow the keeping of chickens?
Do you keep chickens or know anyone who does?  What's your experience with this concept?