Option to use Privatemsg to send ecards to other users

Instead of email, admin could choose to allow users to send ecards via Privatemsg. Maybe this could be like a 'submodule' since I don't know how many people would also like this feature. It would give admins a choice though.

This could lead to integration with the Activity module, where it would say something like "Admin sent a card to Joe." Just throwing some ideas out there!!

Thanks for sharing this cool module with us though. :)