Do you have a problem with your colon?
In this article, Conor J. Dillon notes a fascinating uptick in the use of the colon in the media. Everyone, from the New York Times to well, the entire Internet, seems to be using the colon a lot. I don't know that I ever noticed it, but now I'll be looking out for it everywhere. The colon does give you the sense that you're saying something important.