There's a new project out that is attempting to duplicate the behavior of Expose in Mac OS X for Windows Vista users. If you've never used Expose, it's a great tool. You push a button (typically F9) and all the open windows show up tiled on the screen and they are all selected. This is a very convenient way to find buried windows.

This new project, called MyExpose, is still pretty new and it's a little buggy. But you should keep an eye on this one.