"Use Posterous," they said. "It's easy. Just write your posts there. No need to run your own blog."
On April 30th, we will turn off posterous.com and our mobile apps in order to focus 100% of our efforts on Twitter. This means that as of April 30, Posterous Spaces will no longer be available either to view or to edit.
Posterous will no longer be available to either view or edit. Boom. Gone.
Yet another hosted service that made it so super-easy to do stuff that you'd never ever have to waste time running your own stuff, because only stupid luddites that don't get how awesome hosted services are would bother to waste their time doing that.
If you don't manage your own online stuff, it will eventually disappear. If you do manage your own stuff, you need to have backups so that you can spin your stuff up on a different hosting provider when your current provider disappears.
Reclaim. Own your stuff. Step up. Pick up your game, people.