The big event for this month (at least in this neck of the woods) is the 2011 ANU Chess Festival. Once again this event consists of the 2011 ANU Open, the Master Simul, and the ANU Primary and ANU High Schools events. It all kicks of with the Master Simul on the 29th of July, followed by the Open on the 30th and 31st.
The Open & Minor (Under 1600) have a prize pool of $3300 ($1000 for first in the Open). Entry fees are a very reasonable $65 (Adult, early entry) or less.
Full details of the tournament, as well as a downloadable brochure, are available here.