Based on the sceme of Windows Vista Ultimate.
***** File sizes vary quite a lot *****
Made with the amazingly open source image manipulation program GIMP - a worthy Photoshop replacement.

1440 x 900

I was just playing around with the standard plugins that come with Paint Shop Pro and came up with this sort of "holographic" effect. It reminds me of the on-screen communicator you see in Star Wars EpI. Must be viewed full-screen to understand, the thumbnail can't display the image properly.

1440x900 (also available in 1280x1024)