The Microsoft licensing agreement may not be a big deal in itself. This may be the beginning. MSFT and NOK collaboration has done nothing for MSFt. MSFT needs a new idea. MSFT just had a dance with RIMM. It takes several dances before they get to know better and then comes the ring. No one gives the ring to a girl after the first dance. Let us see whether there will be continuing dances between them. This is a hopeful sign. Let us see what happens after BB10 comes out.
Who are you kidding? There is zero collaboration between MSFT and RIMM. Microsoft turned their lawyers on RIM and demanded payment for patent infringement. RIM caved.
Easy to understand RIM can not handle yet another ongoing patent lawsuit. You can easily find all this.
Changing internal file systems, integrating it, and rewriting all the code using it at this stage of development is impossible; so RIM is already using it, therefore Microsoft can demand as much as they want. And they know how much cash RIM has.