I am not a techie, so this reply may not be technically valid.
Being able to put a route into ones GPS/PND seems an important function to me.
While syncing may not be sensible on security grounds, if WinCE device (or the card) is connected to the PC running SDWeb, then it feels to me as if all one wants to do is download the route, notam, Wx file(s) to the correct folder on the card.
Downloading files is a regular feature of the web. So where is the fire?
I should say that for me its not really a problem .. I carry a full WinXP UMPC with abroadband dongle and wifi. So using full PC application is fine almost anywhere. But for those who need the web app, then not being able to load the GPS is, I wd have thought, a substantial loss.
Rob .. perhaps you could comment further on the download point.
Cheers
D