I just discovered what I have been looking for for years, a source of search engine data, hitwise.com. Comparing their results to my results is interesting They report: Google 66% Yahoo 20.88% MSN 5.33% Ask 4.14% My results (with 1.7 million referrals from search engines in 2007) Google 87% Yahoo 7.8% MSN 2.2% Ask 1% Since I market mostly to engineers I am inclined to think that most of my customers use Google. On the other hand, maybe I need to optimise for the other search engines. Is this possible? best regards wiz