Reid Spring It On weekly special sale.
I think the Reid City 1 (http://www.reidcycles.com.au/reid-city-1-0-bike.html) and/or
the Reid City 2 (http://www.reidcycles.com.au/reid-city-2-0-bike.html)
looks like a good buy for an entry level commuter bike.
Also might still be able to use this deal https://www.ozbargain.com.au/node/206438 to get an extra $10 off (worked for me on 2/9 @ 11pm).
reid has good value.
caveats:
city 1 has old-style freewheel (limited range, prone to breaking axle)
city 2 has suspension - pointless extra weight and cost for a commuter bike.