Hi there. Well, from research I've done in the last few years it seems there aren't that many librarians applying, or at least, getting visas through the State Sponsored stream. For example, last year, the vacancies available for librarians on the skills lists from SA, NT and ACT were kept open without being even limited. On the other hand, the openings are very disputed and I have been told that you have to network a lot before landing a good position, like doing volunteer work, for example.
That is why is so important, especially in Canberra, to arrive with a considerable amount of money so you can provide for yourself until you can get a good position.