You have your Vista in my XP. No.. You have your XP in my Vista!: Looks like a few more Vista features are being back ported to XP. This isn't anything new as some of XP SP2, IE7 and Media Player 11 were all stuff that at one time was said to be "Vista Only". Check out the link to learn more..
XP SP3 FAQ: Paul at the Super Site for Windows has updated his FAQ on XP Service Pack 3. You may want to bookmark this one for updates as we get closer and closer to it's full release.
XP Easter Eggs: These are mostly visual in nature, however, I thought they were kind of cool to know about none the less.