AMD continues to slip behind Intel, as even their newer Deneb processors due for release soon will be shipping only with DDR2 support. DDR3 support will be delayed, though not much, as it has been revealed that AMD plans to begin sampling DDR3-supporting chips sometime in October. The AM3-enabled CPUs are rumored to be distinct from the AM2 processors, meaning we could see incompatible versions of the Deneb being released. That would make things even stickier for AMD.
AM3 based Deneb CPUs still won't go on sale for a while and everything we've seen so far doesn't lead me to believe that the release will be spectacular. It doesn't help that the Deneb CPUs will be pricey. If AMD isn't intending to compete in the high-end market, they sure aren't acting like it.