I would also appreciate syncable categories.

Do the multiple calendars sync or can only one calendar be set up for syncing?

If the latter, maybe one could imagine a solution where different categories where represented as different calendars? I.e. sync like there was only one calendar but put different categories in different calendars.. Would that be possible?

If the former, then one could at least have the option between syncing several calendars without category support OR syncing just one and do the above.

Hope I'm not missing the point...