One of the blogs I visit has a section on the sidebar showing who the last few visitors are, where they are from, how they got there, and what they looked at. I usually show up as arriving via Google, since I usually use a link from my iGoogle homepage to get there. I've seen others show up from various other search portals to view specific items that have been posted, such as pics of various celebrities, articles on specific subjects, etc. That may show up as the reason they checked the site out, but there is nothing to show whether they were interested enough in the site to stick around and see what else it had to offer. Anyway, that's why we're probably getting hits from search engines - the keywords the people are using are directing them here.