By the way: After testing several Android and Ios clients for owncloud and webdav sync, I think that owncloudcmd is by far the fastest. So it is definitely worth pushing the development:

• sub-syncs apparently work, but this is not integrated in simple_oc yet. Also: Multiple sub-syncs would be nice. Note to myself: The call is
  
  Code:

  owncloudcmd dir https://user:password@hostname/owncloud/remote.php/webdav/subdir

• maybe a GUI to configure the syncs
• improve documentation (bugtracker)