that's what many of us has been waiting for, and I haven't heard anyone has anything comming to the Mac soon, unfortunately. In the mean time, I'm hoping Apple will step up and upgrade their mobo design to UMA-2, using 150Mhz bus or something. A 166Mhz mobo has recently been released for the PCs, and Intel is looking to push 200Mhz soon. Make the 200Mhz bus DDR, you have yourself a 400Mhz bus!