I like Posterous. I really do. It's like a much more powerful and more serious version of Tumblr. It's got more options, cool themes, and if their software was open source and I could self-host it, I'd probably use it instead of WordPress. Maybe.
Posterous also has a fantastic iOS app. Lots of features, great UI, and it's just a joy to use. Until you go to post something.
It's been months, and the people at Posterous still haven't added landscape mode to the compose section of the app. You have to type using the vertical keyboard, which really sucks for long blog posts.
Posterous, fix this. PLEASE.