D'oh! Ok, so we took advice from GollyWobbler and dropped our case officer a sneaky email, just reminding her that we exist. Meds, PCCs and all other doc have been with DIMA for eight weeks. AoS letter from Centrelink has been with DIMA since the 4th.
Got an autoreply back saying our case officer was out of the office from the 12th (the day we emailed) to the 16th (Monday). D'OH!
So, another weekend of hanging around. It seems to me that the "few days" at the end of the process are a lot harder then the other 17 months of the process.
Sorry for the downer but, FFS!