http://www.racv.com.au/wps/wcm/conne...seeing+flights
There are 5 Antarctica sightseeing flights going from Australia in the next Southern Hemisphere summer, including one from Melbourne on 15Feb2015. My dad was keen to go on one around 15 years ago, but at 85 he seems to have given away the idea. I've booked a place at the Melbourne information session, but I can't see myself forking out $1100 for a 12-hour joy ride. (And if something went wrong south of Tasmania, there's nowhere for a jet to land.)
By the way, the Antarctica Fact File in the link above is fascinating.