Maybe it's a result of the time I've spent working in wireless, but it seems like there's two parts to the life cycle of a cell phone: the hype and rumors before, and the hype and rumors post-launch (what other carriers it will come to, what revisions will be made in the next version, etc.). The Pre launched on June 6th, and though we've had a few rumorless months, that changes today.
A PreCentral reader named Calvin has come across some information leading us to believe that the Palm Pre is coming in GSM form. When you look at the above picture the model number is listed as P100UNA. Calvin references the GSM Treo Pro here, which was coded T850UNA. The "U" stands for UMTS, and the "NA" stands for North America. If that's not enough dirt for you, a Bluetooth Gadget Guide Listing shows both the P100UNA and the P100UEU (UMTS-European Union version).
With the information presented by Calvin, we'd be willing to guess that a GSM variant of the device will be out and in the hands of AT&T customers in...oh, say...early 2010?