WP Copyright Protection is a WordPress plugin by dave.ligthart that will protect the content on your website. For most browsers: disables text copy, image copy and will keep your site out of an iframe.
WordPress MU, PHP4 and safe_mode compatible.
Requires WordPress Version: 2.3 or higher, Compatible up to: 3.0.5
Download and info: http://wordpress.org/extend/plugins/wp-copyright-protection/