A new service brought out by Google, is Related Links, here is an example:

var google_rc = { format: '300×250_rc', width: 300, height: 250, modules: ['searches','pages','news'], color_line: 'cccccc', color_link: '333333', color_bg: 'ffffff', color_text: '000000', color_source: '6f6f6f', color_header: 'ffffff', color_footer: 'ffffff' };

As you can see, it is somewhat like the Chitika Layout, I am quite unsure what this could be useful for at this moment. Perhaps an Adsense interface merged with this could be an interesting addition to Googles (and the adsense publishers) armoury…