I don't say this very often about a company, but
Compete.com has really impressed me with their latest announcement that paid versus natural search breakouts are available in their search analytics solution. The data shows the percentage of search referrals that a website gets from paid search trended over the last six months. This will allow Web professionals to find out if their competitors are relying on search engine optimization or search marketing, identify spikes in paid search activity with six months of trended data and even enable you to benchmark paid search activity to your competitors.