I know some of you don't like using your OpenID to login, partly because you are stuck with whatever you started with and it probably sucks (like Windows Live).  To help solve that problem you can now add a new one to your profile.  So if one stops working, you now have a backup!
Just "Edit Profile" and then click "Add another login account". 

I recommend using myOpenID.com.  That's what I have been using and I haven't had any problems.  Google seems to work well too.

(If you ever accidentally created a new user, let me know and I can merge them)