The cleanup-maildir py script floating around on the net did not work with a host I read mail on that runs python 2.5.2. I patched it, then a week later realized that , then realized I also read mail on a box that only has python 2.4. So this now works with both.
Note that using 'INBOX' refers to your root maildir (~/Maildir)
Example usage:
cleanup-maildir -d 1 --age=120 --archive-folder=Archive archive INBOX cleanup-maildir -d 1 --age=90 --archive-folder=Archive.src archive src