Updates:
Status: Accepted
Comment #8 on issue 127 by pekka.klarck: Possibility to --include/--exclude
tests based on their status or if they have no tags
http://code.google.com/p/robotframework/issues/detail?id=127
There seems to be real life use cases for this feature: http://groups.google.com/group/robotframework-users/browse_thread/thread/b2fd330834fab5c
