To follow up on my Marker bookmarklet, I’ve created a PopClip extension called WebMarkdown (a.k.a. WebMD) that does pretty much the same thing (take a web page selection and turn it into Markdown). It’s a handy trick when you’re gathering notes or just want to save a portion of an article.
For giggles, I made you a movie. It’s not because I don’t think you grasp what it does already, it’s because I have free time today and it seemed like fun at the time.