I've realized that keepoff doesn't just block out all the keys (including Dpad) when a phone call comes in, but for calendar alarms, too. This means I can't acknowledge an alert without tapping the screen, which is a nuisance.

Back to the phone call: When I get a call from someone who's defined in my favorites with a picture, the on screen buttons for answer and ignore are very small, and hard to tap with a finger. I think the option of enabling the Dpad / Center buttons to select and "click" these buttons would be a big improvement.