http://www.usa.canon.com/CUSA/assets/app/pdf/Promotions/camera/lens_flash_ir_080711_rebate.pdf
The deal's good starting today and going through September 3rd.
Top rebate amount is $160 on the 14mm f/2.8L II, followed by $150 for the EF 85mm f/1.2L II, $120 for the 50mm f/1.2L, and $100 rebates...