There are many ways to upload to Posterous - through a mobile device, email or directly from the web. It is really easy and a really good way to create a low-maintenance photo blog of sorts. It is so accessible. That is the great thing about this application - whether you are on your mobile device, on a friend's computer or your own - you can update your Posterous account. Another cool feature is that you get to choose whatever name you want for your account. For instance, mine is jenniferelston.posterous.com, but if you have a developing business or another blog and want another outlet to share with your friends and fans, this is perfect. One successful example is imjustcreative.posterous.com/ for a logo/design blogger. Graham puts most everything that he would put on his website and tumblr account, but more importantly, everything else that wouldn't quite fit in.
The iPhone application is specifically designed to be a photo-sharing app. When you open the application, you are given the choice of taking a photo or video, or adding an existing one from your Library. You can create different albums on your phone of different people, groups or whatever you feel inclined to make. If you want to share the fun in different ways, you can change the settings so that PicPosterous automatically posts to twitter, Facebook or your existing blogs by visiting http://posterous.com/autopost.