I happen to know for a fact they do accept direct entry captains, and there are two guys who will be joining by the end of this year. one in Townsville the other not sure of base yet.
Rex hr I have found can be tedious at best of times but at this time of year with the 2011 cadet recruitment going on I wouldn't even bother. once all is finalized with cadets in December is when I'd be approaching them..