[galaxy-dev] Data transfer between two galaxy instances

Hi, We are running two instances of galaxy on our site--one internal, the other external. Some of our internal users have data on the external instance. What might be the easiest way to transfer the data of our internal users from the external to the internal instance? OR Is there a way to transfer data between galaxy instances? I thought that I'd give this mailing list a shot before telling our internal users that they would have to re-load the data on the internal instance. Thanks, Len Taing