Multiple Email Addresses per Account?

[kyrnel]

The problem there is that I manage access to certain areas by the account. Creating multiple accounts would be troublesome for managing the access.

One other idea would be to add a user profile field for secondary email contact. I seem to remember a similar hack for vB 2.x.
The trouble here is to make the email notification send to both emails. That should be a pretty simple hack, though, right?