ASUS released a list of all of its Socket AM3 compatible motherboards.
ASUS, worldwide leader of motherboard production, has once again kept up with leading trends and technologies with the announcement to release a wide range of high-performance motherboards that will take advantage of the most high-end and upcoming AMD AM3 CPUs. This new generation of AMD CPUs will encompass the 45nm infrastructure; and will be equipped with C1E halt states for advanced power savings. The most distinguishing feature of the AM3 CPUs is the fact that they will support DDR3 RAM. In order to meet user demands for top-of-the-line CPUs that deliver advanced performance, the ASUS M3/M2 Series motherboards will offer the most completed product lines to fully support the upcoming AM3 CPUs.
Here's the list:
All those boards are AM3 CPU-ready, they only need a BIOS update. Check out this page for more info.