I can tell you that this is a very slim and unlikely situation. I've got a computer store about 50 meters from RIM, and I talk to many employees, plus I know about 5 or 6 personally who usually are "in the know"
If there was talk inside the company of sale, then they would have mentioned small ammounts of information.
You'd have to be stupid to sell the company, especially selling out one of Canada's greatest tech companies.
I've actually just purchased a 7250, I'm quite glad I've got my friends on the inside, it makes learning everything so easy
