2006 is the word. See here. What makes it hard for AMD is the onboard memory controller. I believe that will make it that new chips will be needed to run DDR2 rather than just a mobo change like needed for an Intel.
BE HEARD - Techonvent DS3 | E6400 - 3.2GHz 24/7 | 2GB OCZ PLat. PC6400 | 6800GT | Zippy 460W
What the world needs is more geniuses with humility, there are so few of us left.