Here's a great site for Tips and Tricks with Windows Vista. Numerous links to access tons of information on Vista Operating Systems:
http://www.windows-vista-tips-and-tricks.com/
And for those still wondering about Windows 7, visit this link:
http://www.microsoft.com/windows/windows-7/features/default.aspx
Categories of Windows 7 site include Features, Tour and Videos. If you decide to take the Tour of Microsoft Windows 7, you may be asked to download Silverlight (newest browsing enhancer), which is safe to do, if you are concerned about whether or not to install it.
You can also download new Windows 7 wallpapers free from the links below:
http://windows-7-wallpaper-pack.en.softonic.com/
And at:
http://mintywhite.com/customize/wallpaper/official-windows-7-wallpaper-pack-m3-build-6801/
Enjoy!