Thanks for the tip.  I set myself up on there and added the script to the blog but to this day didn't see any ads appearing besides the self-ads for operation fabulous which I take to mean that no one ever bid for my site.  The traffic isn't huge and I don't post that often so this is somewhat expected.  I've taken the script off for now, will look at it again in a couple of months when I can monitor things more closely.