This to me looks like a Crinia, possibly one of the many morphs of C. signifera but I can't recall if C. parinsignifera also has the white dot in the armpit that this specimen has. I also have some vague memory of there being some difference between the two species in the patterning on the skin near the throat.
From size and shade, I too suspect either of the crinia sp. Looking back at the frogwatch records for the site (only 2006-07 available), there are no records of c. parinsignifera, but consistent records of c. signifera at each of the 4 sites on the property. On this basis, I think its most likely to be c. signifera