Hey, someone explain to me what happened here... seems like twitter bought Posterous to shut it down, and the founders took the money and basically started the same product with a new name and a pay model.
As a blogger it worked fine.
As a developer it was terribly supported. The API was fine, but the implementations were often terribly flawed. Tags could not be deleted. Posts entered with markup could not be retrieved as markup. It was almost impossible to connect to an engineer at Posterous who cared.
I do hope Posthaven succeeds. I encourage you to have an API. I encourage you to treat your external developers with the respect Posterous was unable to show.
Instead of offering it free they have a sustainable business model @ $5/mo, so they won't be beholden to finding a big exit or raising a ton of cash.
Andy Rubin has done this successfully as well (Danger, MSFT, Android).