The Inquirer writes ATI's RD580 can support the upcoming Socket AM2 processors from AMD:
The only significant difference between socket 939 and AM2 CPUs is the memory support and you might remember that AMD chipsets have the memory controller inside the CPU, not on the Northbridge.
That's why ATI can make the support for both sockets with a single chip. We are not sure if ATI altered its chipset much to make this AM2 support capable but our impression is that it won't have to. It should work with the current ones.