The WordPress iPhone app is a great way to keep your blog up to date when you are on the go.

The first time you run the app you will need to add your blogs.  A very straight-forward process needing only URL, username, and password.
 

One caveat is that for self hosted blogs XML-RPC remote publishing is enabled.  That is a simple as checking a box in the “Writing” section of the Settings tab on your blog.

Once all your blogs are set up you then choose the one you want to explore from a list on the app’s home screen

From there you get the choice to view or edit existing posts or create a new post.

 When creating a new post keep in mind that you are working in an HTML format not WYSIWYG editor.  You do have the option to preview the post and in your blogs theme, which does help make up for the present lack of a  WYSIWYG editor.  You can add photos either from your iPhone’s photo library or taking a new one.  The photos already included are displayed via thumbnail at the top of the screen.
 

I really like the app overall and it does help me when I get an idea and want to start a blog.  I expect it the iPhone WordPress app to become even handier as I increase the amount that I post online.