This was a good idea a year and a half ago, I even said it to an associate of mine. Basically, the exact same thing, that RIM should leverage it's lead in the enterprise space by becoming "the" enterprise software vendor on all mobile platforms. The problem now is it is to little, to late. Company have already started to invest in enterprise initiatives on the other platforms. Unfortunate, now it is a saving throw, and as such, everyone knows it is a saving throw.
"RIM realizes end users want no part of its tech, will just keep trying to sell stuff to CIOs"