As we stated in our OCZ Flex-II memory review, DDR2 isn't going anywhere for some time yet. Yes, Intel has plans to remove it from their lineup of chipsets, P45 being the last to support it, but AMD still has the AM2 and AM2+ CPUs that can't change memory. AMD requires a whole new CPU to switch to DDR3.
To this end, DDR2 will remain on the market for quite some time, and the amount that is being produced to this day will keep the prices down compared to DDR3 for some time as well.
For Aeneon's part in the whole affair, the XTune DDR2-1142 memory kit has been an exceptional piece of kit. Not only did it manage to hit its specified speeds (some won't, even on the best overclocking motherboards out there), we managed to just slink past it without any voltage tweaks, making it a remarkable feat for DDR2. One thing is a bit of a pain, however; we couldn't find anywhere to buy it in Australia, or on any major U.S. site for that matter, making it hard to come by.