Reel Big Fish, I missed them last time they were in Australia.
And a tip for all you repliers out there: your answer should be the Dillinger Escape Plan. Saw them in February, and while they're not my absolute favourite band, it was by far the most intense live show I've ever seen.
Case in point? At one stage a guitarist climbed up onto a podium at least 6 or 7 metres above the ground before swinging back onto the stage from a chain hanging from the ceiling, all while playing. This is while the singer is climbing up in the scaffolding and the other guitarist is playing while crowd surfing.