What was the phone business about? Or is Rick just imagining it?
It's real. I think. They sort of addressed it in the Talking Dead and the director said we'd find out in the next episode who was calling (hinting that it may possibly be real)
As far as Rick goes, I feel sorry for the poor guy. He seems to have nearly lost his mind and I'm not much surprised. I think he'll get back on track to himself in the next episode, although I'm still disappointed that they killed Lori so soon.
The Andrea situation is interesting. I'm waiting for the truly cynical and psychotic side of the Governor to show up. I don't think you can really conclude the fighting scene either of those. So far I'd describe him as a generally nice guy who tries to be a good leader although has a strange, twisted side to him.