Social Locking - Entire Website - Wordpress Plugin

Hello,

We have seen alot of Plugins out there for Wordpress where we can specifically lock specific post on our Wordpress site that requires a user to "Share" the post in order for them to be able to read the entire page....however, I am looking for a plugin or script that will allow us lock an ENTIRE site out until you like it, or tweet it, etc.

If you know of anything like this please let me know.

how do you like an entire site ? :S I'm lost :| How about you hide everything from guests unless they register ?