According to the Inq, this is what they say:
http://theinquirer.net/?article=30252
http://theinquirer.net/?article=30252
THERE is a big possibility that existing socket AM2 CPUs might just be able to support the upcoming DDR3 memory. That is the 2007 marchitecture but we spoke with a few people that believe that DDR 3 specification is so close to DDR 2 that it might just work. It is technically possible, it should be.