Nice and simple is back in the business, however, this service could leverage more useful activity if you'd allow it to extend the twitter, i.e, something like tweet-longer type of service. Too often people have more than 140 character to say and something less than a paragraph or a blog post.
What do you mean by extend the twitter? As in post the first part of the article on their behalf?
I was thinking of something like that, but wanted to make the use case as general as possible so people can decide how they want to use it. Maybe I'm wrong :S
Well, yes. The thing is, it is practically impossible to trust a stranger service for writing/jotting-down thoughts on a service like this. It is simply hard to build and depend on it (you gave an example of Posterous - it was something I stopped trusting within few months).
I don't know about the technical solutions, but the way Branch currently integrates with Twitter, the way you can be conversing on Branch and still your conversation spills over Twitter...is what I have in mind in terms of this type of simple blogging service. The paragraph or couple of sentences should spill over to Twitter, and/or the Tweets should spill over to this type of service. All this not necessarily in a way it is currently setup by other platforms (like Wordpress, you can cross-post blogs to Twitter) but something naturally with least effort and distraction.
Am I making sense? There may be some services out there providing this experience, but ... anyways.