Earlier in the year, AMD and Intel talked about the fairly quick shift from DDR2 to DDR3, which both companies have wanted to take place in the latter half of 2007. Now at least for AMD, that has been recalled, and DDR3 deployment is now postponed for them to sometime in 2008. Utilizing Socket AM3, the newer system will be based around 45nm processors. Likely this is better for the market, which has yet to even see a widespread usage of AM2 systems, let alone another socket just a year down the road.
Intel is more likely to produce a DDR3 product next year, though there may not be any room for it should it come too soon.