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As much as I am currently in love with LXC, FreeBSD can't be loaded in a container yet to my knowledge. However some people have worked out a chroot/emulation layer allowing the execution of non-native binaries (http://wiki.debian.org/QemuUserEmulation) which is pretty cool.
This has led me back to virtualization.
I chose to solve the general problem (http://xkcd.com/974/) because I am a nerd and because ganeti 2.5 has been rumoured to support LXC. Since Version 2.2.0 it looks like.