G. Skill has just come out with the new 4GB DDR2-1066 kit. This is also at the same 5-5-5-15 timings and 2.0-2.1 volts. The big difference is that this is uses a 8 layer PCB rather than the 6 layer one used by the DDR2-1000 kit so this kit might have a little bit higher overclocking.

Only bad thing is I don't see them in stock anywhere yet.

http://www.techmessenger.com/G-Skill...080130003.html