OCWorkBench writes AMD is said to be planning to launch its six-core Phenom II X6 "Thuban" processors on April 26th, 2010.
Unconfirmed information also reveal that AMD intends to implement a dynamic performance boosting technology.
As software that takes advantage of multi-core seems to be developed way slower than hardware advancements, this boosting technology will dynamically boost the CPU CLK by disabling certain cores and overclock the rest.
Currently, only Intel has such technology available on its chip. It is known as Turbo Boost Technology.