"Bing Cashback will remain operational until July 30th. After that, the program will be shut down, although Cashback users will have a full year to redeem their rewards."
http://www.discoverbing.com/cashback...BYAb&wom=false
Bummer too because I was just getting a hang of using it as a part of my internet price check routine and was recently refunded $300 on a camera/lens purchase.
Now I'm back to just using RetailMeNot which is great for general gear (backpacks, glasses, clothes, etc..), but not really "electronics."