Australian City Life have event guides for the capital cities:

• Adelaide
• Brisbane
• Canberra
• Darwin
• Hobart
• Melbourne
• Perth
• Sydney

State governments and tourism bodies have event calendars on a state-wide basis:

• Events Pool South Australia
• Tourism WA Event Guide
• Northern Territory Government Events Guide
• Queensland Events
• Tourism Queensland Events Calendar
• Events New South Wales
• Visit Victoria - Events
• Tourism Tasmania Events
• Canberra Tourism

Sport, sport?

... and speaking of events, what's an Australian holiday without some sport thrown in? Make sure to check out sports packages at Australian Sports Tours that include accommodation and tickets for events like the The Australian Tennis Open, The Fosters Australian Grand Prix, The Bledisloe Cup and the V8 Supercars.