According to Graeme Mathieson:
system; subversion[2] and arch[3] can both be acquired through DarwinPorts or Fink. Personally I use Subversion for everything I
Semi-OT: Arch1 in its tla incarnation is more or less dead per Tom Lord's mail recently. revc (aka Arch2) is at the same status. The « officially blessed » successor to tla is now bazaar 1.x[1] while waiting for bazaar 2 (aka bzr aka bazaar-ng[2]) to be usable (in a few months).
In the meantime, I've found another alternative, Mercurial[3]. Written in Python (like bzr & codeville), changing fast but very very usable right now.
I intend to write a Mercurial bundle soon, when I get some time... ----- [1] http://bazaar.canonical.com/ [2] http://bazaar-ng.org/ [3] http://selenic.com/mercurial/