Umm, err, gulp, well, a funny thing happened when I opened up Power Point in the new Microsoft Office 8 for Mac the other day... There is apparently some kind of command in Power Point that opens up their new mail program, Entourage, although I have to say, I don't quite remember how I got there... to automatically attach a Power Point document to either one or more email addresses. I didn't follow it through, because it was a mistake, and I didn't want to use Entourage, but there may be something in Vista that does something similar.
Not much help, but if there really is a similar function in the Vista or XP Version of PowerPoint, who knows
Of course, with the way I type, any number of things are possible...
Chris K