First of all I'd like to say Thank you for this plug in. If find it really useful and works great for me.
I use it to show content to my friends and hide it for other users.
I miss one feature and couldn't find a plugin able to accomplish: it would be great that your friends could find his private page on the menu when they have logged in.
I managed to do something similar using USC in a text widget where I show the links to each friends' private pages, but I would be great not to have to edit it every time I add some new content and be able to organize it in a 'Private Menu' that would only appear when the user has logged in and show the items for this friend.
Do you find it interesting and feasible?