Six years after the idea was created, DDR-II finally appears to make an entry in the marketplace. At the same time, the graphics version of the new standard, that is GDDR2 has already become obsolete, reasons being high power consumption along with thermal problems that negate the marginal performance increase found over the original DDR design.
Lost Circuits have put up an article explaining what's coming for DDR3 and why it may (or should) be adopted almost inmediately.