I just came back from falls in Tasmania, which was amazing, and I want to go to another. Is there anything similar, multi-day, with a similar style of music (ie. alternative / pop / electronic, but not heavy dance oriented such as rainbow serpent)...?
Playground Weekender is coming up, and it has a good rep – http://www.playgroundweekender.com.au/2010/ – it's on next month in Wiseman's Ferry.
Golden Plains is on in March, with Midnight Juggernauts headlining. That one's in Victoria. http://2010.goldenplains.com.au/
The only other one I can think of is Blues Fest, which is on in April at Tyagarah, near Byron Bay http://www.bluesfest.com.au/ about 8 years ago