I always loved how Americans call bags, "sacks" as in we are taking a trip and having a sack lunch...too cool!

Then there is the old "zee" versus "zed" thing...I went to elementry school in our nation's capital (Ottawa) and was taugh to say "zee"...when I moved north, I was chastised everytime I tried to use it in spelling...funny though, you never hear about a Camaro "zed" 28 in Canada...