For folks looking for a really fast and easy way to play around with Plan 9, I would encourage you to look at 9vx: http://swtch.com/9vx/
No virtual machine, just a tarball (available for freebsd, linux and mac os x) that uses vx32 (http://swtch.com/9vx/) to dynamically execute plan9 code in a sandbox.
No virtual machine, just a tarball (available for freebsd, linux and mac os x) that uses vx32 (http://swtch.com/9vx/) to dynamically execute plan9 code in a sandbox.