Just ordered mine for the Canon 5D Mark III will also work with EOS 7D with firmware upgrade (forthcoming).
Abe's of Maine: http://www.abesofmaine.com/item.do?item=CNGPE2
Call their 800-992-2237 x 266 Fred was my sales rep - said he has only 5 left. Everyone else (J&R, BH is out of stock) Free Shipping as well 269.95
Tell him Anthony sent you..( I don't get any kickbacks )..good luck !