There's a jQuery plugin that displays specific greetings to users based on the location they reached the current URL from. If they found it through Google, it would show a greeting that mentions Google or something.
I can see how this could create a more compelling experience for users—as far as I know, "talking" to them is how to best communicate.
I'm considering using this system for my new blog, but needed confirmation that it is a worthwhile effort. Will users really appreciate something like this?