I also use Gas Cubby on my ipod touch. Let me know how the import goes when switching to aCar. I have been messing around with aCar a little and am thinking about switching but I have a couple of years of data in Gas Cubby.
I have not imported data into aCar yet, for now I continue to use Gas Cubby on the (jail broken) iPhone. I will post an update after doing the import.
