Is it possible to resend the email verification?
I don't know of a way to do that but it's a good feature to have.
It is possible to customize. Another sign-up step can be added by developing, so the admin could easily manage this setting.
Vbulletin, Wordpress, buddypress, and other programs have this as a standard feature. I think it should be added and not a paid build on.
Please file a feature request in our feature request area if you would like this added. It is possible the feature request is already there so you might want to search before posting one. Thank you!