I'm waiting for the Athalon 64 myself, but for a differant reason. I figrue even the highest clocking Bartons will be discounted big time after the 64's releasse.
I'm going to build one last socket A system and make it a real fast one. By the time I want/need a differant system the new 64 bit stuff should be out in good numbers and more reasonable prices.
Edit: Before the big price drops on the other Bartons in the last week I'd have expected a paper launch as you say. I don't think they would have discounted the other Bartons so much if the Barton's with the 400 fsb wasn't ready to go.
Guess we'll see soon.