Adorama has the Canon EF 28mm f/2.8 IS USM lens for $349 (reg. $549) with 4% rewards and free shipping. Note that you have to add the lens to your cart to see the final price of $349 during checkout. I have no idea how long this deal will last, so get on it while you still can. Check it out here at Adorama.
Canon USA has the 5D Mark III refurbished for $2,669.20 right now (compare to $3,499 new). The camera is listed at $2,719.20, but you get another $50 off when you checkout thanks to a $50 off purchases of $500+ promo right now. The deal also includes a free Canon 5D Mark III 8GB USB drive. Check it out here at Canon USA.
These deals usually sell out pretty quickly when Canon USA posts them.