At the moment Myer are offering 20% off Belkin Home Automation, this includes the Belkin Insight switch normally $99.95, down to $79.96.
This is already pretty good for those who want to walk into a shop and pick one up off the shelf (you won't find this online, for some reason they don't list the Insight on their website)
I took a photo of the 20% off tag at Myer beside an Insight box, and carried that into Bunnings and successfully got a 10% price beat from Bunnings Alexandria (NSW) for $71.96, which is a total of 28% off the original $99.95.
I would post an image of the Myer tag, but I can only work out how to post one image. [Edit - changed the image to be a combination of both]