I have been working on a few BlackBerry PlayBook applications over the last few weeks. A friend of mind pointed out to me that RIM published up their customary development guidelines for the BlackBerry PlayBook. This guide details how RIM thinks application developers should design their user interface and the different factors they should have in mind for ease of use. These guides are critical since I cannot count how many times developers have tried going against the grain. The BlackBerry World Conference app is a perfect example using the equivalent of a mouse pointer for navigation.
RIM produced a pretty solid guide and I recommend checking it out if you are working on a BlackBerry app. What is truly fun in then flipping back to the PlayBook applications currently available and seeing how they stack up.
Check out the BlackBerry PlayBook UI Design Guide at this link