I know it's not the answer you want to hear, but short of a limited release to Micron PC for use in their "XP" series, you can't get them yet in the US (I've read that some lucky stiffs in the UK and Germany have been able to get their hands on some).
It's been reported in the financial news that AMD's plant has had (undisclosed) production problems. When I phoned AMD, no one would even give me an ETA on the 266MHz FSB T-birds!