I used to use
http://www.australianbanknotes.net/ to identify Australian banknotes but when I went to visit it tonight it's prompting for a user/pass. Weird, no idea how to register there as there's no landing page to do so. It never required a login before.
Is there another decent site to look at information for notes (and coins ideally). I'm really after prefix information, signatures, etc.
Thanks.