Free VMWare/Parallels, open source even!

Via ArsTechnica, news of a free open-source PC emulator for OSX called VirtualBox.
Right now, it only runs on Intel-based macs, but I gave it a quick test with DamnSmallLinux and it runs quite well. I’m impressed, and will experiment more with it. It’s really amazingly polished for OSS, professional as hell.
Excellent news, this. Screenshot of DSL running with Firefox:

