I don't know if the maps are compatible, but I can tell you what I know about them (not much I'm afraid). The maps are in a file format *.fbl and are stored in the iGo/Content/Maps subdirectory. As far as I know, nobody has tried replacing the map files yet; until that happens we won't know if they have to be digitally signed or if they are 'locked' in some other way.
The F-Series use a 2GB flash drive, of which about 1.6GB is used. The Maps folder is about 820MB in size.
If the files are compatible you could delete the existing map files (make a backup first of course) and drop in your new ones.
I am sure that the F-series is technically able to have the map updates since basicaly it is just a matter of loading new files into it's internal storage. Whether Pioneer will release new maps, or offer them for sale, noone knows till it happens.