Do you want your users to be immediately directed to their profile page upon logging in? BP Profile as Homepage will help you do just that. Users who are not logged in will see your regular homepage. After a user has logged in, he will see his profile. Upon logging out, the user will be redirected to the site’s homepage. This plugin works with WordPress 3.0, BuddyPress 1.2.5+ and is Multisite compatible. One thing to note is that the home button will redirect to the user’s profile every time with this plugin. If you don’t like how that works, you can grab Brajesh Singh’s BP Redirect to Profile plugin which will only redirect upon logging in.