There has been allot of work going on in the background on the Portal infrastructure to get it ready to take on even more tasks. The first thing you might have noticed (and was blogged about early) is the Portal has got some curves, but the progress hasn't stopped there.
Now you can login into the Portal with your Bugzilla login. There is one caveat to this, your Bugzilla email address must match your committer email address. The next obvious question is 'how do I know if my email addresses match?'. Simple log into the Portal with your committer login and scroll down to find your personal information widget. If the email address on file matches your Bugzilla email then you are good to go. If they don't match then you are only two clicks away from fixing it.
If you want to talk about multiple email addresses please leave those comments in bug #209838.
Darn Good Developer