The latest MSDN arrived today which includes
a public download for Windows XP Service Pack 3 Release Candidate 1 for
folks who are interested. Word is: "Windows XP SP3 RC is a rollup that includes
all previously released updates for Windows XP, including security updates,
out-of-band releases, and hotfixes. It contains a small number of new updates,
but should not significantly change the Windows XP experience."