How about this: When you're giving a PowerPoint presentation, all your notes for the current slide are shown in the glasses. Perhaps even the upcoming slide?
If you liked the Spinning Cube of Potential Doom and AfterGlow, you should check out NetGrok at http://www.cs.umd.edu/projects/netgrok/. It allows real-time analysis of a live packet capture and is released under the BSD license on Google Code. It was presented at the VizSec 2008 conference on security visualization.
Disclaimer: I'm one of the project developers.