I don't trust it. After having to get another VPS and build (read: piece together) my own Posterous-like system (it's not half as good) I've already paid $$$. Paying these guys 5 bucks more with no way to know the same thing will or won't happen doesn't seem sane. The system doesn't even WORK yet! How dare they.
We just fixed a major problem with our HAProxy instance. The floodgates are open and everything is working awesome now. Please come back and give us another chance.
We had no idea when Posterous would shut down -- it's been a project Brett and I have been working on in our spare time for a while and we had to literally scramble to get this into launch-ready state.
We fixed it (in case you're wondering, make sure your HAProxy Maxconn setting is high enough, say 1024 connections, if you're serving static assets behind it in addition to dynamic content.) and we hope you'll give us one more shot.