Build 5270 was released yesterday as the December CTP - if you've got access to MSDN or Connect, you should definitely check it out. There are some awesome changes in this build.
So, there are probably a fair number of you out there who are interested in using Vista in combination with Microsoft's Virtualization offerings (Virtual PC or Virtual Server), either as a host or a guest. Over the next few days, I'll be posting some tips for using Vista in conjunction with those products for anyone who's interested.
First of all, here's a few general tips:
Hope that helps for now.