Bit of a non-sequitor, but why are you using Chef instead of Puppet? I don't usually deal with VM stuff, but I've recently started looking into it and it seemed like Puppet had a clear lead in functionality, or perhaps my mind is just playing tricks on me at this time in the morning.
I have used both and find that wile Puppet is a good tool, Chef has a clear lead in functionality and in community strength. Also, the Puppet DSL is a pain as u have to learn both it and ruby.
