I used the address presented on this site.--
Geoffrey Rush
Shanahan Management Pty Ltd.
Level 3
Berman House
91 Campbell St
Surry Hills, NSW 2010
Australia
I self-addressed the envelope and brought to the post-office where the postage was applied and payed for.
Here is the autographed on the picture I sent to him. (i framed it)

~ Shep
