Avid says that Media Composer 3 will support Windows Vista Business. Do you think that it will also support the other flavors of vista (home premium and ultimate)?

Avid has always been very specific about OS's, down the exact version, SP's, and patches.  Although others may work, your results will be unpredictable.  Personally, I'd rather have seen Windows XP 64-bit support.  We're running MC 2.8.3 on that, on one of our DS Assist Stations.

Randall, I agree with You, totally! However, as of today, what is the benefit of running Avid on top of XP64 as the application is not  written and compiled for that environment? Is it any better than running it on regular 32-bit XP?

One interesting feature of Vista is that while installing you can choose not to enter your product key, then you can install ANY 32-bit version of Vista for a 30 day trial period.

What I plan to do is this: I have a copy of Home Premium for my media center PC, I'll set up a dual-boot on my business PC, install Ultimate in the trial period version and see what works and what doesn't. If Avid runs on Ultimate I'll buy a Ultimate license and use that. If not, I'll go with Business.

My 2¢

"what is the benefit of running Avid on top of XP64 as the application is not  written and compiled for that environment?"

We run it on the DS Assist to process EDL's and AFE's for the DS Nitris.  We didn't necesssarily "need" the 64-bit paltform, it was just a convenient box to put it on, as the DS Assist is right next to the DS Nitris.  Meanwhile, MC runs fine on it ... for what we're doing.  I supposed we're taking advantage of the additional RAM too.