There are times you have an application or job task which requires windows, and you need a Windows box with the least amount of hassle and small footprint.
Behold MicroXP; a stripped down version of WindowsXP. Match weight: 100MB distro, <500MB HDD, <50MB RAM, ~10min almost inputless installation and <20 second bootup time!!!
Just to test it out for development in parallels, downloaded Java 6 JDK, Maven and tested out the Smacking up Groovy demo in less than 10 seconds which creates a full Java/Groovy development environment with no hassle. And it worked!
Conclusion: Damn sweet footprint! You can propably get your chores done, and still be smiling. Bill Gates won't love us, but since when has he appreciated Java anyways?
PS. I have been using OS X for over a year, and allthough MicroXP is sweet and sexy, I'm still content with having moved away.