With intel machines being the ram hogs they are, if you use Rosetta and/or windblows, 4GB is about the minimum nowadays......(
Yeah. OS X & Intel isn't a good combo for memory right now. I can get more done in Windows on one of the Precision 690s that I mis-specced with 2Gb of RAM.
I'd like to see built-in support for SAS drives as most of the new 5000X boards are coming with that. Perhaps Apple will offer one of the 8800's as an option, seeing as when the refresh comes along this won't be the latest graphics card (I notice they never offer the latest).
Perhaps a new case? Not that the Pro needs it since it's still the prettiest 'desktop' around but beyond that I don't see revolutionary changes at this point.
Mind you, I probably won't be changing this machine anytime soon - depending on Vista experiences it might be the last Apple desktop I buy for quite a while.
On a different level though, looking at the usage patterns of many users here (and myself for the Pro) I'd like to see an architecture change or split for the Pro range. I doubt - given the choice of Apple boxes that you have nowadays - that many users are using the applications to benefit from the Pro's system architecture, which is basically identical to the Dell Precision 690, a high-end workstation. What I'd like to see is an equivalent of the Dell XPS 710 for the OS X platform that is designed to be Boot Camped for gaming - I think that might attract even the hardcore enthusiast users if they know Boot Camp won't involve any compromises at all.