Has anyone tried self-e-publishing using a shareware method?

Amazon.com has an Honor System service, where you can post a link on your own website and readers can "donate" (for lack of a better word) if they like what they've read.

I've had mine going since January and haven't made a buck- but then, I don't have much content on my meager site.

Has anyone else tried this, or know of any success?

(My goal was mainly just to get my work out there in a semi-professional look)