One of the problems is that apparently the Verizon network does not allow simultaneous voice and data... including a ring notification... to come through. So, if you are surfing the internet, downloading an tune or app, the phone can't ring or be answered. Calls go directly to voice mail.
This problem would be the same with either the 'Droid or iPhone. It's a network limitation.
I still get calls when I’m surfing on my Blackberry.
I get interrupted by calls when I’m Freeping on my Dare.