I toyed with whether I wanted to make this change for well over a year because allowing users to change their email addresses (after having confirmed it via the registration process), implied I would need to confirm them again if you changed it in your profile after the fact... ...but after much deliberation, I decided that's really unnecessary - the whole act of confirming emails during registration is solely to ensure the person registering is "real" and not a bot. Once you've done that - what do I care if you go and change your email address???
So - for those that have wanted it - have at it!!! It's available in your settings...