Okay — I moved my tablet from Vista to Win7.  Total time: 46 minutes start to finish for a full install of the 64-bit version.  All of the equipment is working fine, including the touch screen, which is now multi-touch enabled.  Seems to be working faster and well.

So far:  no problems.

UPDATE:  Other than Acrobat not transferring properly (of course it would be the expensive program!), everything is moved over and working.  We updated the Vista 64-bit desktop, as well…this was the “update”, not the cold install.  It’s taken almost 2.5 hours, and was a major pain to get it to start running in the first place — it didn’t like the anti-virus program.  It didn’t like this.  It didn’t like that.  But once it was running, it’s been smooth.  Waiting to see if all the programs and data were transferred as they’re supposed to be.