WordPress.org

Where is the admin page!

There is none. All management is done at the Actions tab at the admin dashboard. There are a few extra setting under 'reading' where you can set how many friends/messages/events you want to show.

Can I add friends from other social networks?

Sure, as long as they have an RSS feed you can add them manually.

Is there a P2P Social Networker version for <your non-Wordpress website here>?

Not as far as I know. But as long as your site has an RSS feed and supports a bunch of XMLRPC methods, you're good to go.

Which methods?

That sounds good! Interested? I only use two methods at the moment:

xmlrpc_encode_request('P2PSN.sendMessage', array(
    name => "name",
    image => "image",
    url => "website",
    message => "message"));

xmlrpc_encode_request('P2PSN.requestUser', array(
    name => get_bloginfo('name'),
    image => "http://www.gravatar.com/avatar.php?gravatar_id=".md5( strtolower(get_option("admin_email") ) ),
    url => get_bloginfo('wpurl'),
    feed => get_bloginfo('rss2_url')));

Note: Your email address is not shared, only the MD5 hash (this is the same stuff WordPress uses to save your passwords) is outputted to the browser.

Does P2P social networker have <your feature here>?

I doubt it, but feel free to send me a request.