Guess what ?! Wordpress is now working on iPhone too , not just for reading , but also for writing, editing and other stuff .
Introducing the first Open Source app that lets you write posts, upload photos, and edit your WordPress blog from your iPhone or iPod Touch. With support for both WordPress.com and self-hosted WordPress (2.5.1 or higher), users of all experience levels can get going in seconds. Download it now!
If you want to stay updated with Wordpress for iPhone news , you can read their blog : http://iphone.wordpress.org/blog/