BuddyPress

I’m building a small community site with BP and I want to make it pretty much entirely for members only. The blog page should be the landing page once you log in, and when you are not logged in you should only access a custom ‘about/intro’ page. How can I do this?

I tested some different membership-plugins but I guess I haven´t found the right one yet.

Their’s lots of plugins that do that. Have a look at the plugin directory.
eg. http://wordpress.org/extend/plugins/buddypress-private-community/

Or; code it yourself.
http://pastebin.com/rgJ6BQc8 (thanks to David from friscotheme.com for the pastebin)
just paste the code into your bp-custom.php file and modify to your needs.

Yes I know there is plenty of plugins but I couldn´t find any which behaved exactly like I wanted it to.

But I managed now with a custom code: http://pastebin.com/3Wj8e8aH
& a seperate plugin for handling the redirect to blog page upon login (Peter’s Login Redirect).

Anyway, thanks for helping!