My bank (ANZ) gives me SBD6.5 for each Australian dollar which is an absolute rip-off but I have no other choice. They are also useless to deal with on the phone (which costs a fortune). I recommend if you are in Australia and intend transferring money over that you open a Westpac account before you move as they seem to give the best rates on TT's, (followed by CBA).
Speaking of phones - best to use skype, though internet is quite unreliable and expensive here.