Once I've finished my port I'll start writing up a bit about the cocos2d-x experience (especially from the perspective of allowing developers to reach more markets with reduced overhead).
One thing I will say is that it seriously need some improvement on is documentation, so I don't know if there's any resources RIM could throw their way to help with that. First thing to tackle are the quick wins - I shouldn't have to drill into CCNode from CCSprite to find out that the rotation unit is degrees. It'd also be nice to see, with each class, a couple of lines of snippet code as a very basic example. The general impression I get from many of the docs & tutorials is that they're OK if you've used a similar framework, but they do make big assumptions about prior knowledge.
But, with the documentation aside, it's been a very painless process so far for me to port over and android game I made (using libgdx so had to re-write). I'll be doing some refactoring at some point where I've made a bit of a rush job of certain things (fine from the user perspective, but I can't look at the code without cringing), but it does seem to lend itself to you doing exactly as much custom code as you want to achieve your goals. That's something I really appreciate - I'm not forced into one way of doing things.
