[Alfa1]

Those are very nice feature requests. I'd like to add two:

1. Spam control: send a link in the invitation email to allow the recipient to report spam to the forum admin. The recipient can click the link and the forum admin will get a notification about this. This will prevent members spamming.
2. A simple feature that is very necessary is to have the message content comply to anti-spam rules of major email providers. This can be done by adding a short message on the bottom of the message which explains: (1)to which email address the message is sent (2)why the recipient has received the message and (3)how the recipient can report abuse(see my other feature request). By complying to the anti spam rules of large email providers like hotmail, yahoo, gmail and AOL, you prevent getting blacklisted as a spammer.