The following forum message was posted by sbrath at http://sourceforge.net/projects/s3tools/forums/forum/618865/topic/3917609:
Do you think you could add in a cfinvalidate command to allow me to post either
a batch-file, or a file-glob that I want to invalidate in the Cloud Front cache..
Might be willing to pay a bounty... Msg me...
Also, I think the default on sync should be guess-mime-type, not None. But that's
just my thought :)