Thanks Prashant for roping me into the discussion.
Yes, Ambrose relies on the unreleased Pig 0.11, or the patches that Andrew references.
Ambrose has only been open sourced for about a month has been well received. We're in the early stages of the project but we're moving fast on it. We're still working on getting our first release published to maven, which should happen soon. I think it would be great to have it included in Bigtop and would be glad to help out.
That said, I'd love to hear others take on how useful they're finding it.