Pyrit 0.2.4 was just tagged and is now the currently stable version. Enjoy.

The most important new feature is the ability parse packet-capture files and attack EAPOL-authentications on it’s own. See the recent posts or the documentation for more details. Pyrit can also use SSE2 on MacOS and SELinux-enabled machines now.
definitely an awesome release. I've watched the progression of the trunk, and the new capabilities work great...

original post here - hxxp://pyrit.wordpress.com/2009/08/16/pyrit-0-2-4-released/

grab it from here - hxxp://code.google.com/p/pyrit/downloads/list