I figured if it was under equipment it might get lost or not noticed until it was over.

http://www.bjp-online.com/british-journal-of-photography/news/1868268/canon-announces-christmas-cashback-offers

Photographers will be able to claim back �25 on the purchase of the EF 50mm f/1.4 USM and EF 85mm f/1.8 USM, �30 on the EF-100mm f/2.8 USM MACRO, �50 on the EF 17-40mm f/4.0L USM, �70 on the EF 70-200 f/4L IS USM, �75 on the EF-100mm f/2.8L MACRO IS USM, �85 on the EF 16-35mm f/2.8L II USM, and �100 on the EF 50mm f/1.2L USM, EF 85mm f/1.2L II USM and EF 70-200 f/2.8L IS II USM.

Says Canon UK I didn't see a US version yet, but probably the usual sources, Adorama and B&H will have their offers running.