Saw this advertised in the MX today. Promotion starts 17/11/2011 and ends 20/11/2011.
It's the same bundle that was on sale last week at DSE, but $20 cheaper.
Seems to be in-store only as their site has the bundle listed for $499 - http://dicksmith.com.au/product/YG5589/xbox-360-250gb-kinect…
The advertisement also mentioned a 'bonus free installation' which I looked into and it seems they give you a bonus Xbox Live 1500 points card according to this page when you take them up on the free installation. Might be worth the trouble to some.
Interesting. Curious if anyone knows cheapest standalone kinect?