I think the "Official" release date on TMO US might have been February but many of us ordered them in January 2009. Late Dec 08 / early Jan 09 in Europe I believe.
This string contained the chatter when we were able to start buying it. What did you pay for your 8900?
Who knows when it will be replaced? I would expect it to be out 2-3 years, even when something newer comes along.