The ability to run existing and future Android apps from day one would be a huge competitive advantage for RIM. I'm not sure how well apps would run in a virtual environment, and there could be issues with access to hardware features/APIs, but overall I think this would be a good move for RIM.
What are the odds of this happening? Boy Genius Report (BGR) has a pretty good track record is seems have pretty good sources.
Exclusive: BlackBerry PlayBook and smartphones to run Android apps?:
Here is the big news: we have been told RIM is very much considering the Dalvik virtual machine, and we ultimately expect the company to chose Dalvik. If that sounds familiar to you, it’s because it’s the same VM that the Android OS uses, and it would allow RIM’s PlayBook and other QNX devices to run just about any application built for the Android platform.