I too wrote my own system - which uses Perl. Mine is called Slaughter and the upcoming 2.x release allows you to fetch policies/instructions from remote servers via one of:

* rsync * http * git clone * hg clone

etc. It is pretty extensible and covers my needs. Beyond that it is a little hard to know.

http://steve.org.uk/Software/slaughter/new.html for the upcoming 2.x release.