Tumblr released a new “Submissions” feature to streamline community-driven blogs. You can enable it from your blog’s Customize screen to let your readers submit posts via web or email. “The author starts posting about a topic they care about, the readers start contributing, and before you know it, the author has become a curator. Tumblr has always been uniquely suited for this type of blog,” said David Karp. Off late, this type of content submission has become popular, an example, Disqus comment service allows bloggers to take comments left on their site and turn them into full posts.