Re-send "new user registration" email button

I think it would be really useful to have a button in every user profile that allows you to "re-send activation email" or "re-send registration email". This way if a user doesn't sign up right away and loses track of the email they got as a new user, you can easily go into their account and re-send that email to them rather than having to reset their password and crafting an email indicating this.