This topic is brought to you via Blogger for iPhone.
Anyway, Blogger is a very useful app. In fact, I'm using it right now to publish this topic.
As you can see from the pictures below, this app can publish your topics to your blog. You can type your topic, add pictures to it, and add your location.
Just like the regular blogger, you can save to drafts, view your blog and switch between your blogs from the settings button.
The main disadvantage to me is that you can't arrange your pictures location or your font options.
App name: Blogger
My rating: 8/10