Your user name is most likely the first initial of your first name and your last name. You originally received an email with both your user name and password in it.
User:
Password:
Don't have an account yet? No problem. You can register now. Facebook users can sign in here.
Forgot your password? No problem. All you have to do is register with the same email address as before. Instead of creating a new account, the system will email you your old password again.
You can also use Google Friend Connect if you have a Google, AIM, Yahoo, any OpenID account.