You should be able to change it on the "Account" tab of the "Edit Profile" page you can get to from the big blue button on your profile.
@mcfate : I go to my account tab and I see my email address there... but when I highlight it to edit it, it doesn't change when I go to type in the new address.
Hm.
Any ideas, @th3j35t3r? It may well be used as a database key, so it could be fixed at account creation, like the user ID is, I suppose.
One thought: changing your email address might require entering your password as well.
@mcfate @th3j35t3r : Just tried that. Still can't get in. Thanks for the suggestion!
@mcfate @th3j35t3r : Thank you for trying to help!