Hey,
Disclaimer: this has nothing to do with prefix specifically other than me talking about it on the irc channel with some of you.
Vagrant is a virtualbox management script,*you can read about it here: http://www.vagrantup.com


Basically it allows you to build a set of vm's using either chef or puppet as a configuration manager from a base box.After that you can destroy the vm environment, as long as you keep the basebox and the manifests/cookbooks you can resurrect it in minutes again.


I've finished a base-box for gentoo which is suitably small (800M) to be distributed.
It's a very basic gentoo install with few additions installed.*- puppet-2.6.2 + deps

*- vim*- metalog*- vixie-cron*- latest virtualbox guest additions*- sudo
There are no manpages, docs or info pages installed, no nls support and the kernel sources are compressed.

The kernel was generated using genkernel.
You can download it from here:*http://dl.dropbox.com/u/4270274/gentoo64.box


I'll see if I can make a set of ebuilds for vagrant and dependencies next week, most of the required dependencies are already in portage (and work on my macos64 prefix)the only two that are *missing are the virtualbox gem and the vagrant gem itself.


Have fun with it,
Ramon
P.S>*If you're on prefix you need to install the libffi / ruby-ffi libs from portage and NOT use gem to install them. If you don't vagrant will appear to work, but fail somewhere in the vm-instantiation process with unclear errors.