We mentioned Posterous on their launch about a month ago. At the time, they were an interesting email-to-blog platform – but they only supported creating their own custom blogs. But with some changes just announced, they’re suddenly a much more interesting platform: you can now use Posterous as an email conduit to a number of other sites.
Specifically, Posterous lets you set up passthrough posting to your Twitter, Flickr, Tumblr, Blogger, WordPress, Typepad, Livejournal, or Xanga accounts. It’s still the same workflow: send an email, get the content hosted, it shows up – but now you can vary the email to post to any of your registered sites, or to all of them at once. If you find yourself firing up a blog editor just to pass on a photo or a snippet of info, a Posterous account could help streamline your workflow considerably.