If you have never used Posterous before, it is basically a blog like WordPress or Blogger but with the ability to automatically post to a range of other services such as twitter, Facebook, Flickr etc. I use it to post to my self-hosted blog from my iPhone. If I’m blogging about an app, I can simply take a screenshot and email it to “blog at Posterous.com” with a few words. You can also set it up for combinations such as “blog+twitter at Posterous.com” etc.
The main benefit of blogging through Posterous is that my Flickr photostream isn’t clogged up with screenshots.
Glad to see the new app and all of the features it brings. It’ll make things far easier to manage. I must be honest, it feels a lot like the WordPress app, but with the added benefit of also displaying the number of views a page has had.