Shawn just sent me this.
Source: http://www.theregister.co.uk/2007/03/23/java_emulator/ and http://www.physics.ox.ac.uk/jpc/index.html
Researchers at Oxford have built an x86 emulator that runs purely on Java, making it ideal for security researchers who want to analyze and archive viruses, host honeypots and defend themselves against buggy or malicious software without hosing their machines. The JPC also emulates a host of other environments, giving technophiles the ability to play Asteroids and other software that’s sat on shelves for years collecting dust.
JPC is a pure Java emulation of an x86 PC with fully virtual peripherals. It runs anywhere you have a JVM, whether x86, RISC, mobile phone, set-top box, possibly even your refrigerator! All this, with the bulletproof security and stability of Java technology.
This is my favorite screen dump .. a Nokia booting MsDos!