The best thing is, that the bikes suggested in these posts aren't just bikes with low seats. They're also great bikes!
Honda 599? Buell CityX? Ducati Monster? (well, OK, only if your Ducati dealer is close by) These bikes are serious fun.
I've ridden the F650 and it's not necessarily for short people. The R1150R comes with a factory low seat option, though, and it's a terrific bike.
However, sport-touring bikes for short people are in, well, short supply. An R1150R with luggage and a clear screen would work pretty well as an S-T mount but it's maybe 550 pounds wet.