Every year SEMPO (www.sempo.org) takes a look at the state of search engine marketing. The results of this survey are used to help not only report on the issues, trends and elements of search marketing, but also to help point the organization in the right place for its members and sponsors. SEMPO's survey results are quoted in multiple publications throughout the year in articles that reference click fraud, price-per-click, search advertising spending levels, etc. This provides visibility for our work and the SEM industry. All part of the original goal of SEMPO when I helped found the organization in early 2003 - educate the world of advertisers and agencies on the value of SEM.
All advertisers and agencies and consultants are encouraged to take the survey - one representative from each company. http://www.sempo.org/learning_center/research/sempo_research/sempo_2006_state
20 minutes time and you will be contributing 'real' data to an important study.