So a person (a right handed person) holding the phone in their left hand and pressing the numbers with the their right hand goes to hold the phone up to their ear it goes black instantly.
I don't have a Droid (I have an Alias and iPod Touch) but.... That seems to be a weird way to dial a cell. I'm a rightie so when I dial my cell, I use my right hand to hold the phone and use my thumb to dial. If I have to expand the keyboard, I flip the phone the other way to use the keypad with my thumbs.
When I thought the problem was just a quick timeout during an actual phone call I would slide out the keyboard and this would force the screen to stay on.
I just did another test using my thumbs and that works.
I use my thumbs to text, but my finger to punch in numbers during a call.
If the Verizon guy doesn't know of a way to change this black out setting I'll have to get use to using my thumbs.
I bought my wife a Droid for Christmas. She's a righty and hasn't had this problem (that I know of). When I get a chance, I'll play with it and see it I can duplicate your problem. It's a great toy to play with.
Trying calling her voicemail and when it asks for a password press three numbers with your right hand to see how it's suppose to work and then try pressing three numbers with your left hand.
I wasn't thrilled about making this upgrade and paying for a data package. But it's only been a few days and I can't see myself going back. If they had an app that streams movies from Netflix I wouldn't have any buyer's remorse.