I'm thinking about buying it for my next blog. What are your experiences with it?

I've had better response to just setting up a del.icio.us account for a site and then posting related articles to that del.icio.us account and having del.icio.us automatically posting a list to the site.

To set it up, you'll need to poke around in your del.icio.us settings and click on the "daily blog posting" on the right hand sidebar.