You can now, for example, post to Tumblr simply by adding a note to a pre-determined Evernote notebook. This makes offline Tumblr post writing much easier, especially when using and iPhone. Or, post to WordPress by using an Evernote tag.
This has such potential. And basically does away with the need for the likes of Postach.io. Especially when they charge for this exact same service.
Time to get my thinking cap on. This could be super useful.