ozemail have a really good BB package if you want to keep the costs down
256k download spd and 64k upload (average accross the board really)
300mb dowload limit/ month
unlimited hour usage/ month
all at $29.95/ month.
if you exceed the 300mb as nodoubt we would you dont get charged extra, but
you speed slows down to dail-up speed (ie 56k)