I believe the big difference here is that Google Voice would work on their "data plan". I think that most cell phone companies are very nervous about that idea. They have a very sweet deal charging 50 bucks a month for voice and 50 a month for data. Considering that Eric Schmidt was on the Apple board for a long time I really don't think their is very much malice against Google. I don't see the motivation for Apple to deny it. I would probably put the malice with being partnered with AT&T. I would imagine that no VOIP apps would be a staple of their deal.

What I eat depends on where I am. At the theater it's popcorn. At home, it's time to raid the fridge, no holds barred.

Couldn't you also just block all non-internal jabber traffic then?

Yeah, posting "first post" would be shameful simply because it is spelled correctly...