That's the qualification; the hardware does support serial capabilities for Bluetooth GPS and keyboards;
But I do not think they plan to software-enable the serial capabilities at least at first.... I do know the hardware capability DOES technically exist to work with Bluetooth keyboards -- it's just a software upgrade to enable this.
They may not allow this, because of their biggest customer (the government), but it might be possible on consumer BlackBerries. Here's hoping for BlackBerryOS 4.1 supporting external Bluetooth keyboards and GPS.
But it does give me a valuable lead. I have sent an email message to mattayi(at)rim.com pointing to my Bluetooth keyboard thread
Let's see if he responds, and I will post the response (but only with his permission).