The other day I stumbled across Google's 1-click for free program, which is a way of indexing content that can normally be viewed only by registered users. I was surprised (and somewhat embarrassed because I'm typically up on anything that can affect SEO) that I didn't know much about this program, even though it's been around for quite a while. I figured that if I didn't know much about it, chances are that many others didn't either. I thought I might write an article about it at some point, but needed to better understand how one might implement the technical aspects on their website.

I knew I'd get some additional info from the smarty-pants at the High Rankings Forum!

See the thread here:

Methods for Showing Specific Content Based on Referrer