To speculate that they would be interested just because you don't like their OS and think their development team is too slow is also incorrect.

I will agree that their OS is lacking in many areas compared to many of the newcomers in this space, but that doesn't mean they run out and buy another failed phone OS for a whole lot of money in exchange a few features their rapidly growing team could implement or a smaller acquisition like their purchase of Torch Mobile could deliver. RIM's main focus is also more enterprise customers than consumer and the feature set demands of their customers are a little different.