Micron 2Gbit DDR3 ready to go
 

Micron Technology is on its way to producing DDR3, and the company believes it is in a favorable position to offer competitive pricing and take the lead in the next-generation SDRAM race. However, the transition to DDR3 will not come quickly and will involve support from the entire PC ecosystem, so DDR2 will remain the mainstream for the next few years.

http://www.digitimes.com/bits_chips/a20070607VL203.html