If you're going to use the GSM radio, I wouldn't freeze anything that says global (except for global phone unplug, that has nothing to do with anything). I have no personal experience, that's just an educated guess.
ContactsUnconnected I've never heard of. It's not on my phone, and I've never seen anyone else mention it. It may be part of one of your apps, in which case I wouldn't freeze it?
Mediasync is ok to freeze.. i actually like having it frozen because I don't get the stupid mediasync icon every time I plug my phone in via USB.
I wouldn't freeze motorola services.. Dunno what it is, but it sounds important.