Posterous is an amazing way to create a content workflow, where you can email, sms or post via the web to your Posterous account and have it auto-post to any account you have set up on a variety of other platforms, including Wordpress, Drupal, Blogger, Twitter, and a bunch more. Specifying the account to post to is as simple as sending your email to a specific account, or multiple by using a plus sign in the email address.

The uses of this are tremendous, and include aggregating the Posterous feed into RSS search engines and other RSS distribution points.

Downside?