According to this Intel workstation marketing pamphlet (pdf), Intel's new workstation platform will support Fully Buffered DIMM system memory technology (FBDIMM).
FBDIMM technology allows for greater memory capacity and higher bandwidth due to the addition of an Advanced Memory Buffer (AMB) on each DIMM board. Throughput is theoretically increased 300% from previous-generation DDR2-400 memory, and memory capacities up to 64 GB are supported.
Intel was previously rumored to be contracted with designing the next-generation PowerMac/Mac Pro's motherboard design.