Did not check this stuff yet, but it looks pretty cool...

klipfolio4 personal dashboard

"With KlipFolio you don't have to give up your desktop to stay on top of what matters to you. And with over 4000 Klips available for download---all small, resizable, customizable and skinnable---you're sure to find exactly what you need to stay ahead of, well, everyone."

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Vista Visual Styles Pack 6.0

"Vista Visual Styles Pack description
Free Vista theme for Windows XP
Change your old Windows XP theme to look like Vista using MSStyles! Plus you don't need to download any software to do it either (so your computer won't get messed up!). You can do it all by yourself and when you are done it is surely going to look like Windows Vista and move like Windows XP ;)"