TheRegister.co.uk reports that IBM has joined the HyperTransport Technology Consortium.
Apple is a member and uses the interconnect technology in their new PowerMac G5. Although IBM's PowerPC 970 (G5) does not presently support HyperTransport directly, Apple uses a bridge chip to provide compatibility at this time.
HyperTransport is also being used by AMD, and allows high-speed (up to 12.8GB/second) between various components on computer motherboards.
Related link: HyperTransport.org