We are on maintenance and have the Foundation II package. It's not clear if we'll get a license for AutoBuildz or not.
I didn't see it under #Applications after doing a generic install of the production release of Wildfire. Before I paid for it I'd want to evaluate a trial version. Search the PTC website but couldn't find any mention of AutoBuildz.
From what I found at PTC Autobuildz is included with both the Flex3c and Foundation Advantage packages. As usual it's impossible to really tell what capabilities each package includes and what functions are nominally present as cripleware.