I published the first review of a new Opteron socket 939. This CPU uses San Diego core SH8-E4 and features 1 MB of L2 cache. It is available at speeds 144 (1.8 GHz) to 154 (2.8 GHz). Price should be comparable to if not less than A64.
The link is HERE . Just it isn't in english but pictures speaks for themselves.
This one particular sample of Opteron 144 OCed very well - it allowed for a 1 GHz speed gain what is more than 55% of it's nominal clock.
CPU-Z thinks it is s940 but it is s939. Vcore had to be raised to 1.50V to get this stable. Cooler used was a BOX for FXs and X2s (the one with copper base and four heatpipes).