Very disappointed in Apple.
Free case? Yeah I'll get my refund, but I will not get the next iPhone.
The fact that they put the antenna OUTSIDE of the phone makes this issue much larger! Other phones (and their own 3G/3GS/2G) have it INSIDE of the phone, so grabbing the phone with the antenna inside will not cause such an issue.
An iPhone with a bumper is large enough to have the antenna inside. Problem solved, if you are one of the tiny minority for whom that makes a difference.