I finally made the switch to Origin with this deal. It's the best discount I have ever seen.
It's not only for Gas and not only for Integral Energy customers like the previous Origin offer (http://www.ozbargain.com.au/node/82469). And the discount is not from inflated rates like TruEnergy's offer (onebigswitch). Even better, this is only 12 month contract so no long commitments.
Before someone saying check the rates not only the discount %, Origin's rates are the same as the regulated tariff rates (at least in NSW).
Enjoy
This is only for NSW customers though. Might be good to put that in the title.