You should add a feature that lets you enter the e-mail addresses of your friends and if they have an account on your site, it will tell you and you can add them as a friend. Or if their friend(s) don't have an account on your site it will invite them to come join your site. Also, please make it so you could find/invite people on your site individually (enter one e-mail address at a time), in bulk (separate multiple e-mail addresses by commas or line breaks), or if you want, even allow users to take contacts out of their address books for Yahoo!, Gmail, Hotmail, and other popular e-mail websites. You could also make it so users of your site can link their account on your site to their Facebook, MySpace, Bebo, Particle Cannon, Hyves, myYearbook, Twitter, etc. and it will let tell them which of their friends on Facebook/MySpace/Bebo/etc. are also members of your site and they can add them to their friends list on your site, and invite their friends who aren't members of your site yet. Also, if you do decide to add Facebook Connect (and/or other services), then could you also set it up where whenever you make a forum topic and what-not it will automatically send an update about the topic/activity to your Facebook/etc. stream?