the first 2 are my bands as I can think of that one really quickly.
Obat Batuk [80's hc punk rip off. from Newcastle]
http://fliptopresant.bandcamp.com/
Amateur Drunks [pop punk - recess and early lookout records sounding
stuff I guess. from Newcastle]
http://www.youtube.com/watch?feature=player_embedded&v=74b-2u5L9l8
Grannyfist [Porno grind. From Newcastle]
http://noisemachinerecordings.bandcamp.com/album/nice-004-grannyfist-2003-2007
Thorax [a bit doomy and a bit ambient-y, can't really descirbe. From Sydney]
http://www.youtube.com/watch?v=d2SuUOYGaho&list=UU6oW5uvuz5sx2ghF7ITgZKA&index=18&feature=plcp
Ivan & The Backpackers [nice fast hardcore punk. from Blue Mountains]
http://ivanandthebackpackers.bandcamp.com/
No Art [Wire / Mission of burma sort of thing. From Sydney]
http://www.youtube.com/watch?v=ZQyvnx8kpE8&feature=related
Jesus Christ Posse [hardcore band. Pretend to be christians. From Woy-Woy]
http://jesuschristposse.bandcamp.com/
Spoonfed [Slow crust, sort of dystopia sounding. From Sydney]
http://www.spoonfed.greendestroyed.com/
Ramps [Dinosaur Jr / mudhoney type thing, ex/members of subversion, further, sounds like sunset. From Sydney]
http://www.youtube.com/watch?v=KEtb-2gSTng&list=UU6oW5uvuz5sx2ghF7ITgZKA&index=13&feature=plcp
Chinese Burns Unit [pop punk ex/members of lawnsmell, frenzal rhomb. From Sydney]
http://poisoncityrecords.bandcamp.com/track/chinese-burns-unit-buy-the-farm
Darkhorse [Crusty thangz. From Sydney]
http://dark-horse.bandcamp.com/
There are a bunch more but I can't really find any internet presence, all those youtube vids doesn't really do them justice either

.
Will post more from other state.