According to Amazon this is supported.  Looks like its done by doing a put where the source is a also in s3, if you copy within locations there is no charge which is ideal (well it costs two reqeusts, copy and delete original but way better that download and re-put it).  This tool doesn't support that option though.  I'm no Ruby developer otherwise I'd have a go.  I assume this is a new-ish feature as none of the perl libraries I've been looking at support this either.  The article I was reading is;

http://docs.amazonwebservices.com/AmazonS3/2006-03-01/API/index.html?SOAPCopyObject.html

As far as I can see this doesn't support copy yet (I'm on 1.2.4). If I put two s3 locations in the put command it errors.  If it supported the copy function (or put from and to s3) we could perform our own versioning.  I had a look at the source code but Ruby isn't my strong point and all I've managed to do is break the script so far!

Is there any sort of ETA on when a copy function might be available?  I'd be more than happy to assist in testing, this tool is otherwise excellent!

Cheers,
Luke