From today until May 14th, M$ are giving 20% cashback on the RRP, making it $40 cashback for kinect, $30 for wireless N adapter etc.
"Eligible Australian retailers include, but are not limited to: EB Games, JB Hi-Fi, Big W, Dick Smith, Harvey Norman, Myer, Target, WOW and GAME. Purchases made from auction websites are not eligible for this promotion."
See the link below for rebate values and T's & C's:
don't forget to combine with the 5% RACQ offer on Wishcard