I've been using with Parallels on my Intel iMac - the Beta5 was released yesterday with a slew of new features, including virtual machine USB support and lots of bug fixes.

First of all, this virtual machine technology is fast; it certainly feels faster than VMware on similar hardware and running the same OS. Compilation is so quick within Gentoo I constantly find myself doing double takes to ensure it really has completed what I asked for.

What seems to be even faster though is the speed of development. We seem to get a new release every week of the beta, and it isn't just bug fixes that are being incorporated, we get new features with virtually every beta release too.