Here's the latest official response from T-Mobile pertaining to the T-Mobile G1 pre-launch availability. If you didn't pre-order the T-Mobile G1, you are now OFFICIALLY SOL.
Given the great anticipation and the heavy pre-sale demand for the T-Mobile G1 with Google, we nearly tripled the number of phones initially available for delivery on our Oct. 22 launch date, and have sold through them all. However, to accommodate additional T-Mobile customers who want to pre-order a device, they now have the opportunity to place a pre-order through Oct. 21, for delivery at a later date.
Also, people can still pre-register on the T-Mobile G1 Web site to be notified prior to launch where they can purchase the device beginning Oct. 22. Details are available on the T-Mobile G1 Web site, www.T-MobileG1.com.
UPDATE: T-Mobile customers who want to pre-order a device, they now have the opportunity to place a pre-order through Oct. 21, for delivery sometime in early November 10th time frame.
Thanks Kristen, T-Mobile Spokesperson