Yesterday seems to have been a fairly busy day at Microsoft, with ALL the press releases I have been reading since I woke up. All of this is in preparation of W7 RC1 and eventually the RTM coming April 10th.
Here is a screenchot of an upcoming background available in W7., and I have listed the link to this article below it.

There are 43 screenshots listed there so you should come away with a lot from this blog post. As promised heres the Link;
http://www.informationweek.com/news/windows/operatingsystems/showArticle.jhtml?articleID=215400011&cid=iwhome_art_Opera_mostpopjavajolt