Hmm, (what I think is) a minor feature request, involving the sync process...
First, using scp, which cannot have the password passed to it as an argument... The sync process does not ask for the password, and fails instead. The exact same scp command works fine on the command line, except that it asks for the password first.
Second, it would be nice to only synchronized certain categories, maybe allowing multiple categories to be selected, as some programs, like OS X's iCal, store different categories, so to speak, in different files. Files like Home.ics, School.ics, Work.ics, etc.