Want to learn more about Windows Vista without having to install it? Microsoft is offering a Vista 'test-drive' program that allows you to use the new features of the OS before loading it on to your system. The site includes videos on how to perform certain tasks in the new OS, and it also has a terminal server version of Vista that you can actually play with.
The test-drive program runs in the Internet Explorer browser, and does require that you install an ActiveX control to use the site. If you're really interested in seeing and playing with Vista before you install it on your computer this is not a bad place to start.