These are the noon-time market exchange rates for May 2009 and June 2009 from the Bank of Canada (and a bit of April 2009)

Other Helpful US Banking for Canadians Articles:

• Currency Exchange Rates at Canadian Banks
• Canadian bank-issued US$ Credit Card for Canadians
• Canadian-based US$ Dollar bank account offerings 
• Canadian-based Euro currency bank accounts
• Opening a US-based bank account as a Canadian

It should be said that these rates aren't the rates one would actually get at a bank or currency exchange, but are rather a representation of what the actual true rates are as determined by the Bank of Canada, which is the central bank for Canada and not a commercial bank.