I just ordered Canon's 100L Macro lens at Best Buy for $899.99 plus tax. Assuming I get the rebate, the effective price will be $803. So, at the time of my order, 2:15pm Eastern Time in the U.S., the price mistake had not been fixed.
I also ordered a 100L but I made it as store pick up. Now I'm thinking I should have let them ship it direct to me so they won't have time to rescind the price (crossing my fingers).
Bodies: Canon 6D, T2i gripped, EOS 5, EOS 100, EOS M
Lenses:EF 24-105 F4L, EF 70-200 F4L, EF 70-200 F2.8L mkII, EF 100 F2.8L, EF 50 F1.8, EF-S 18-55mm, EF 28-80 USM, EF-M 22,M mount adapter
Other : 540EZ, 320EX, 430EX II, Yongnuo triggers & strobist stuff