The correct dates for all 2014 shows are as follows:

Brisbane 16-18 May 2014 RNA Showgrounds.
Sydney 27-29 June 2014 Sydney Olympic Park
Canberra 5-7 September 2014, Budawang Building, Exhibition Park.
This is the building used in 2012 and every year prior.
Melbourne 24-26 October 2014, Convention and Exhibition Centre

Forum members can get discounted entry to all shows, at the below links, when they become available:

BRISBANE - AVAILABLE NOW
SYDNEY - AVAILABLE NOW
CANBERRA - AVAILABLE JULY
MELBOURNE - AVAILABLE AUGUST