IBM developerWorks is running a curious article by Chris Ward that describes how to "Construct and package a Linux LiveCD so that it will ... operate as a standard Windows screensaver." Why would you want to run Linux as a screensaver? Well, mostly because you can, but also "to help remove two obstacles to the wider adoption of free and open source software ... the perceived difficulty and disruptive effects of installing Linux [and] the uncertainty of hardware support for Linux." The project requires QEMU, a PC emulator I've been hearing a lot about lately, and some modifications to its source, but it's pretty straightforward.