I probably spend as much time looking at an X Windows display as I do working on Windows Vista or Mac OS X. Why? Because most of my day job work involves working with Linux. It is pretty easy to install X11 on Mac OS X. Windows, however, is more of a problem. So, I was pretty excited to learn about...

Xming X Server for Windows

...the other day. I haven't tried it yet. I'm definitely planning on taking a look at this soon. It would be great to work directly with a remote X Windows client through a secure SSH tunnel rather than using VNC.