Facebook announced a host of changes to its Notes feature on Friday. Notes originally appeared on the site as a means for users to write extended entries (not unlike Engadget's own Public Access) though it never really caught on with the user base. However, the update transforms Notes into a tiny CMS within the Facebook ecosystem. Changes include the ability to add cover art, caption images, resize inline photos and format text.
I think it can impact other blog services since people can now post their blog post on Facebook instead of using Tumblr, WordPress, and Blogger to post articles to.