11-10-2011 01:46 PM
I think it is best to tailor your app icon per device model as per these guidelines based on os 7.0 devices
11-11-2011 10:18 AM
My experience is (might be that RIM is killing me for this statement) that when you create an AppIcon that have a size of 128px by 128px that this will be rendered on all devices more or less acceptable.
Of course all the devices needs to resize the actual image so that it will fit on the home screen - but the home screen implementation of RIM does a great job on this. Yes of course it does not come with build in photo shop like abilities - but the scaling of my AppIcons is really at a very acceptable level.
So when you do not have device dependant CODs (build) and want to use one build for all devices (from OS7 to OS4.x) - then honestly try a 128 x 128 image.