As one who has developed several apps for Diablo and ported several others I must say that Nokia has a long way to go to make life easier for the developer. When I started it took me over a week to get scratchbox setup configured and working properly and start to be able to develop.
I just recently started on Android. WOW! What a difference. Download their SDK's and Eclipse and in an hour I was working their sample programs and using their emulator.
I do prefer Qt and C++ over Java but Google has obviously spent a lot of money and effort making life easy for developers (I assume this is true of Apple as well). I can't say the same for Nokia.