So even though we have reasonable packages out there for Puppet and Facter, some people prefer to install this sort of thing through MacPorts, the closest thing we have to a third-party packaging repository on OS X.
Anyway, Puppet and Facter are both out now.
nigelk@sillymidon [/Users/nigelk]
$ port search puppet
puppet @0.24.8 (sysutils)
Puppet is a configuration management solution.
nigelk@sillymidon [...]