In Canada we accept American coinage as regular coinage too (up to quatres, but even then it is a rare occurrence). It is really only American pennies we get. However, try the same thing with Canadian coinage in America, and people go crazy...
However, in America, it is legal to give a 100 pennies to a business as a form of payment, if an item was a dollar. In Canada, that is no longer legal tender, and the person receiving the change can chose to accept up to 25 pennies. Like I did today, I refused to take a lady's $1.20 in penny change.
Yeah I get a lot of Canadian pennies at Taco Bell, actually. o__O