As I said in the other tread - my sis-in-law has the iPhone - no Mac to go with it and she likes it as long as she has coverage. In non-fringe areas it blows; no coverage/no service. She does not get off the beaten path (major highways and small towns) that often so for her it is a non-issue.
When we were all back home at her parents over the holidays she had no coverage (50 miles south of Pittsburgh), so she had an expensive MP3/electronic organizer! Her cousins were thrilled to see the expensive iPhone that did not work up there!
In this area, IMO, and based on the CONUS travel I have done, you cannot beat Verizon for their coverage... I have never had a coverage problem.
The only thing that scares me about the iPhone is the report of broken screens - it does not take much of a drop to shatter the glass. The phone will still work, but the glass screen will cost you ~$200 to replace!
uch: One of the engineers here dropped his off his desk, with a protective case, onto a thin carpeted floor and it still broke! There are a TON of posts online about this.
Good Luck!