Note: You can modify the post slug (or page slug) by clicking the Edit button next to it. http://en.support.wordpress.com/posts/new-post-screen/#post-title-and-url

Yes, I know that one should have short titles, but honest how many of us always create a blog title that's only 5 words or less all the time?

Such an option would keep the Recent Comments Widget list of referenced blog titles, shorter and less cluttered looking.