[MajorFm.com]

This is great but needs to be incorporated within the registration process, so after the user registers, it redirects them to invite your friends page where there is a simple:

MSN Username
MSN Password

Aim Username
Aim Password

Yahoo Username
Yahoo Password

....and so on, with then ONE button that says invite, this would then login in, and send a pre-defined e-mail to all contacts on that users list e.g.

Hi Mark,

I'd like to see you on the Urban Music Forum. It takes just 2 minutes to register...

Please visit: www.majorfm.com/forum/register.php

See you there...

Thanks,
Matin

This would then work very well, the fact that the user has to check/un-check, write the message themselves etc puts them off, big sites like Hi5 etc did exactly what is written in my spec above.