Who are you?

If you've never noticed before, there is a little thingy on the side of the screen that shows whenever someone visits my blog. It uses some marvel of technology to detect where you are and shows the city/state/country and when you stopped by. Most of the time I can figure out who goes along with where, but there are a few that have just been driving me bonkers because, try as I might, I cannot think of someone that I know from..wherever. Example: Plainfield, Illinois...who are you? I know people in Chicago, but I Googled Plainfield, and it's not so close to Chicago. It's driving me nuts!