Every Day I'm Stumblin'

I have been looking at how people find my posts, and it looks like people just stumble upon my page. Literally. There is a website called stumbleupon.com where you enter categories that you are interested in and the site directs you to a random site that coincides with those categories. It actually seems like a pretty cool idea for those of us looking to find sites you might never be able to find if you weren't looking for them. I wonder if posting about stumbleupon on a blog that is frequently found with stumbleupon will create a causality loop. Hmmm.....