Yes, Blackberry is ubiquitous in the business crowd because it is SO well integrated to corporate mail and easy to use. This crowd is NOT about figuring out how to Bluetooth something; they can have trouble figuring out which button to press to start the presentation, let alone set up the projector. (That's not a knock, it's just reality of where their priorities lie.)
The Playbook could be a terrific extension of the Blackberry corporate e-mail, document, always connected capability. WiFi, alas, is not everywhere; and one worries about its security -- another cornerstone of Blackberry Enterprise. As yet another fully integrated Blackberry device, with the ability to "pair" with a known mate -- same e-mails, PINs, etc on one device or the other simultaneously -- what a joy. But if they incorporate complication ...
uh-oh.
So, yah -- it's unreleased and the folks at RIM are very,
very smart. Let's just say the jury is still out but leaning toward the defendant.