If you want or need to know where your competitors advertise, the just started WhatRunsWhere.com might be for you. It is a competitive intelligence service covering online advertising both on the web and mobile for both display and text advertising including search engine ads.
The service is giving access to the data of above 40 advertising networks. By providing a broad array of tools one may get deep insights into the activity of competitors. Features included are the ad networks ads are running on, locations and size, date and countries.
This has its price with $279 per month for both web and mobile internet. Much more affordable is the package for the Google Content Network alone, which is just $19 per month. To get further information view the introductory video below and visit WhatRunsWhere.com.