Can I run Linux, say... Gentoo or some other distro, within OS X via something like Xen? I want to be able to use OS X for my OS, but still be able to develop in a linux environment because FOSS development is just SO much easier on Linux than in OS X. Building dependancies can take all day in OS X, in Linux they just work. I want a virtual machine running Linux/Apache/MaxDB/Subversion running inside my MacBook. Is this doable?