AMD mentioned at their Analyst Day that 30 new server designs would be out in Q1 2005. A few of them will be from Dell. They are designed by Sanmina and they will run on Broadcom chipsets. The deal is printed out and already signed.
http://www.aceshardware.com/forum?read=115112638
http://www.aceshardware.com/forum?read=115112638