Just one sugestion
It´s possible to u to make an option to people invite theyr msn friends?
Invite your msn friends
Please insert your msn login:
( The system will access to your list of friends through a secure connection )
When they click on proceed, the system will connect to the msn through the login that the user inserted, and will get the list of all contacts and will show on an internal page, the user will be able to choose the friends he want to invite by selecting the checkboxs
Now that the user choose the friends he want to invite, he click on Invite link, and the system will send the default email for invitation, or one composed by the user to the list of emails he choose.
Ok, i know this is not usual on phpbb, i never seen a mod that do this, but i already saw a lot sites that use this function, like hi5 and many others..
I think it´s not that hard to implement this future on your mod, the hardest thing is to get the script that do this, but i will look forward for it.
Basicly this dont need to be integrated directly to your mod, since the system tracks the referral link of each user. So the referral link just need to be present on the invitation email..