I know you were half joking, but you know that once the ability to make/receive calls comes in, the forums will be flodded with "calls hang up for no reason. stupid nitdroid, can't even do it right" or "you can't put the volume up, you can only hear at the same volume. so stupid"

I think the team doesn't want to open up that can of worms just yet.

Be it hardware, software, or politics, whatever reasons they have, (since they are the ones smart enough to port it in the first place) are probably very good ones.