B&H Photo is offering free next day shipping if you order before 1:00PM EST on Monday, December 23, 2013. This is on select items, but by looks of things, that includes most in stock Canon items. So if you want something before Christmas day, now's the time.
There are lots of great deals, including the EOS 5D Mark III at $2699, the EF 24-70 f/2.8L II at $1699 after mail-in rebate and the EF 70-200 f/2.8L IS II for $1799 after mail-in rebate. As always, you must begin the checkout procedure/be logged in to see the updated prices.
Unfortunately the free next day shipping is only for American customers.