Hammer is expected to debut at least @2ghz.
Supposedly its 10~20% faster than the athlon with 32 apps at the same clock speed, using 64bit apps will give up to 60~150+% performance increase (depending on application of course)
It will support MMX, SSE, SSE2 3dnow, and 3dnow2 (actually 3dnow2 is what AMD calls its SSE implementation)
we won't be seeing 64bit games until the HAMMER becomes mainstream and it probably won't happen for at least a couple of years.
Optimus Prime+Megatron= Opteron?
Sometimes I hate being right everytime.