A good, basic guide for those entering the world of Google Adwords. Thus far, our experience of current CPC campaigns shows we earn £2 for every £1 spent. That said, the nature of our highly targetted B2B products means the impression counts are always low (long tail stuff) and clicks counted in the dozens a months.
However, it is a major focus of 2007 for us and will be a core component of our attempts to fix the struggling site.
Inside AdWords: New multimedia guide about the Google content network