If you're interested in using Windows Vista to share files, check out this TechNet article recently published. Here's a brief abstract:

Microsoft® Windows Vista™ has made some important changes to the way that file and printer sharing works. This article describes the changes and provides step-by-step instructions for sharing files and printers and connecting to shared files and printers for a small-office or home office network that does not use an Active Directory® directory service domain.

--Jill