It appears that Chromecast is available through Big W for $38 by activating the offer proposed by Everyday Rewards in your email.
$36.10 price possible by way of your ING Orange Everyday 5% cash-back through Visa paywave.
http://ausdroid.net/2014/11/07/chromecast-available-38-big-w...
Mod: Thanks to daveaus who has informed us that the deal is available in store for EDR members, so activation of the offer (which many didn't receive) doesn't appear to be required, contrary to previous information.