This paper ( [link|http://library.lanl.gov/tsunami/213/scheff.pdf|http://library.lanl....mi/213/scheff.pdf] ) lists a number of features around Australia that they think may be "tsunamigenic". Unfortunately this particular team hasn't actually checked the features in person to see if they fit the hypothesis. They're only going by satellite images. Still, it's something more specific to look at in Google Earth :)