Looks like I just used the wrong e-mail address. Forgot my Ubuntu One account used a different e-mail address than I used for Ubuntu forums. Oops.
So I've lost all my personal data: registration date, friends etc. Can we do a re-association using the "correct" address? Being reminded, I now recall I actually had a good reason to prefer using different addresses. Or if we really do have to use the same address for all Ubuntu One accounts can we delete the newly created account and do it over to get the association?