I know this won't be of interest to everyone, however the beta version of VMWare Workstation 5 is available for download.

I use VMWare at home, and at work - both for development and production use. Hell, I've even had it running multiple game servers on the MPU servers not so long ago! If you've ever wanted to try out another OS without blowing away your current system, this is a great solution.

This new version has many great features, like multiple snapshots and the like.