U-Haul's list of top destinations (based on the number of inbound U-Haul rentals) for 2008:
Austin is #9..and if you notice, it's a hell of a lot smaller than pretty much every other city on the list. Austin is slightly larger than Portland within city limits, but Portland's metro area has a significantly higher population. Kansas City is the same story (smaller city, bigger metro population). I'm actually typing this from #13.