A good friend of mine is a researcher for a financial company. He's one of six people on a team who researches tech companies for investment reports that come out. He's mostly just a rumor collector, who then tries to prove or debunk as much as he can. His information gets passed up the chain where more senior folks make decisions about what parts of the data set they want to run with in their official reports, blah blah blah. Anyhow, before its unveiling, he had strongly suggested the new Mac Pro would be modular and "very expandable" but had very little to offer otherwise. The theory he picked up on, and ran with is this... because Thunderbolt is a direct path to the CPU, and is seen as a single pipeline to the OS, that it could be possible to see CPU expansion boxes on the Thunderbolt chain that basically give you add-on CPU power, and somehow the box just sees it as a second proc and you're off and running. This seems sloppy to me on a number of levels, but also may make sense why Apple went with a single CPU design, if they knew that even CPU expandability was somewhere down the road... What say you?