So I'm reading the "Random" thread and I see that Dan made a reference to the "Buffalo Diaspora". That got me to thinking -- many American cities, particularly Northeast/Midwest Rust Belt cities, have large numbers of ex-patriots who've moved to new environs.
Dan has mentioned in other threads that practically half of the populace of the Charlotte metro area has some kind of Buffalo connection; South Florida is well-known for large numbers of New Yorkers; and I seem to remember lots of Detroiters embarking for Houston as a kid. This isn't simply a big-city phenomenon, either: I'm sure that many mid-size and small cities have their own diasporas, too.
Where did your city's people move?