Seriously, I think it's so painfully obvious we won't see any benefits moving into DDR3 before >PC3-16000 and Nehalem CSI.

Behold me puny DDR2... oh woe is me poor DDR2
http://imageupload.com/out.php/i57499_cachemem.png

btw, it does DDR2-1066 with it's designated 4-4-4-12 timings, but running async to fsb actually yields poor perfomance in contrast with 1:1

Only benefit for DDR3's sake atm, I grant the lower voltages. My sticks need about 2.3v to push it stable over 500MHz :D