mas, AMD 90 nm process is not too matherial to discuss yet. We don't know when they will get 3 Ghz there.
Fortunately for AMD, they will deliver Athlon FX-53 on socket 939 in April. This beast will have 2.4 Ghz, 1 Mb cache and dual-channel unbuffered. It should score two full speed grades above current Athlon FX-51, or three speed grades above current A64 3400.
I think it will benchmark better than Northwood 4 Ghz and more or less in line with Prescott 4 Ghz. Can anyone remind me when Prescott 4 Ghz is expected?