Just a reminder that Windows XP Service Pack 2 Network Installation Package for IT Professionals and Developers is now available on the Microsoft download center. This package is appropriate for anyone who needs to update multiple servers in their environment; an update for just a single machine should be available on Windows Update pretty soon. If you have any SQL Server installations on XP, I recommend that you watch SQL Server and Windows XP SP2 webcast to learn how SP2 affects them, then download the SP and get testing.
Additional XP SP2 resources: