Thanks Aaron Ross Powell for the blog post about Micro.blog! On cross-posting:

But the magic, and the reason Micro.blog and services like it are the way the social web ought to work, comes in what it calls “Sources.” These are other platforms, including many social media platforms, Micro.blog can automatically syndicate everything you write to. And for many of them, it can pull back in replies so you can have a conversation without leaving the Micro.blog interface.