Dick Smith - 42inch Plasma for $499 delivered
From the 12th to the 13th they are offering a HD (not Full HD) plasma tv for $499. Online offer only, but price includes delivery. The tv has an rrp of $799, and DSE normally sell it for $699, but it can be had here (http://www.eljomedia.com.au/Vivo_42_HD_Plasma_TV_p/viv-pdp42hd.htm) for $659.
According to http://www.energyrating.gov.au/ it has a 2 and a 1/2 star energy rating, using 693 kWh/annum with normal use which isn't too bad.
Look, this is not a top of the line plasma (Italian design, made in China) so you can expect some compromises - eg fewer inputs, ordinary speakers, and would definitely take care in running the set in initially - but it is the cheapest I've ever seen a 42 inch plasma on offer. Even JB's "Soniq" equivalent is $598. I had been thinking about getting a Panasonic for the kids games room but this is half the price.... with the difference I could get a PS3....