New social features

I've uploaded a couple of new social features that you can play with. There are two ways to find out if someone has written on your profile; you will now get an email notification if you've given us your address, but you can also subscribe to an atom feed for the comments. These changes should make it easier to keep up with your comments. As well as that, if you invite your friends using the "invite contacts" page, once they join up, the site will automatically send you a friend request. When inviting people, you can also select a group that they will be added to when they sign up. This should make it easier for you to create groups with your friends. As always, if you have any comments, let me know in the forum!