Now that was easy. I guess the downside is that you have to give your username and password to Posterous so they can post. But that seems to be something that is happening more and more as the "social networking" consumes the Internet workspace. The other downside is that any files you post in your content will be hosted at Posterous.
Plus side, that was almost too easy and there will be those in the opposite camp for where any posted files will be hosted (at Posterous)