Would be great to have the public/private option for appointments.
Even if the phone does not support it, it would be very handy for Google (and other) synchronisation.
No, its against my philosophy to support tags which aren't supported from the phone. But you'll get a tipp from me: Set in the prefences for the sync that you want to sync only private entries then MyPhoneExplorer will set the flag also on new uploaded entrys.