Thoughts from the iPhone Recruiter:

What happens if you are using tethering on your Verizon iPhone and a call comes in?

Of the 1000′s of iPhone Apps that are meant to be used…WHILE you are on the phone, how will those work on the Verizon iPhone?  Example: Talking to someone and trying to give them directions on a web-enabled map

How many AT&T iPhone users will switch to the Verizon iPhone because, and I say this from personal experience, AT&T’s coverage sucks?

Verizon is already sold out of the iPhone.  They sold more pre-orders than any phone previously released.  While this will keep iPhone on top in terms of total units sold.  Android is a juggernaut and will eventually outpace the iPhone in total units. 

What does this mean for the iPhone Developer?  Learn to develop for both platforms.  I have previously stated my philosophy of  cross platform mobile development (Develop on the iPhone first).  I still stand by that as a best practises.