Some of us are waiting for the next Mac Pro model. Here's a link to the first test I've seen of what is likely to be the new Xeon processor:

First look: Intel dual- socket Nehalem EP benchmarked | News | TechRadar UK (http://www.techradar.com/news/computing-components/processors/world-exclusive-intel-s-dual-socket-nehalem-ep-platform-benchmarked-487131)