I’ve been using git-svn for a while now with nearly all my svn-based projects, so this was a logical step when Rubyforge started offering git hosting a while ago.
So now you can use
git clone git://rubyforge.org/actsasferret.git
to get your local copy of acts_as_ferret.
I plan to keep the svn repository’s trunk in sync with the master branch, so svn users aren’t left out in the cold.