Thanks for the heads-up! What link did you have? Here's one I found:
http://www.microsoft.com/mac/downlo...download/MISC/RDC2.0_Public_Beta_download.xml
From reading what's on this page, it will probably support other versions of Windows in addition to Vista. It didn't read to me as if it would exclude other versions.
At work we're heavily into Windows. Desktops are almost all exclusively XP; we won't start to transition to Vista probably until next year. We do however have more machines running Windows 2003 Server, which at the user level has XP-like functionality with the older "classic" interface. Connecting to either through RDC is easy and relatively painless (or is that "paneless"?! -_^)
While MS could make RDC work only with Vista, I think even they know it would be both pointless and annoying to users. Of course that's never stopped them in the past.
In terms of selling more copies of Vista, they're all set. They don't need to do it through RDC. They have two methods that are most effective.
1. Stop licensing older versions of Windows. While there was backlash from customers and OEMs (Dell, for instance) to buy XP versus Vista, eventually MS will stop licensing XP. In the not-too-distant future, if you buy a Windows PC it *will* have Vista.
2. Terminate support to older versions of Windows. They do that regularly. Eventually XP support will stop. The Windows security model being what it is, corporations will quickly move to Vista.