Offhand, HSBC and the Royal Bank of Canada in Canadian currency. Pretty sure you can open an investment account with Interactive Brokers in multiple currencies although that's not a true bank account.
You might have to go to one of their foreign branches to do it though. I don't know if you can just show up at a branch in Iowa (for example) and they would know how/be able to open an account denominated in another currency.
You might have to go to one of their foreign branches to do it though. I don't know if you can just show up at a branch in Iowa (for example) and they would know how/be able to open an account denominated in another currency.