Let me throw an idea out for discussion. Many people suggest that Mac Pros are low volume compared to most of Apple's other products, that it's a "nuisance" for Apple to keep making them. So what if, for 2010, Apple kept only the SP Mac Pro, and dropped the DP Mac Pro?
Let's assume that Apple sticks to Xeon type silicon, but SP only. Why not? It simplifies their R&D and manufacturing, and Intel gives them 6 cores "real soon now" which realistically should be enough for 90% of Mac Pro users.
Or would the Mac Pro people be devastated and inconsolable over such a development?
i work for an HP server shop. most of our Proliants ship with dual CPU's but we've bought a few with a single CPU. Same motherboard except there is an empty socket and a terminator or lack of a terminator. forget which.
same with MP. Apple can use the same motherboard and just ship with one CPU there for people who want 1 CPU