Like others have posted, I have also had a surprising number of page views without knowing it. The secret for me was Google Images. Got an iPhone image from Apple's PR site and uploaded it to my homepage. Now my page shows up in image search on Google, Yahoo, and Bing.
Once I realized what was happening, I added some code to my webpage so that removes itself from the frame it's embedded in. It's essential the same as finding it on a web search, but it's page rank is a lot higher on the image search due to the iPhone image.