I went and opened a new (just released) online checking account through American Express. You must be a cardholder.
Much to my dismay, there is no option to add a joint account holder, such as my wife.
I called, and a very nice lady indicated that this option would be available at the end of the year. It was also refreshing that I was immediately put through and did not have to wait.
I asked her to cancel the account until such time they offer the option and she did.