WordPress has updated their iPhone and iPod touch app with support for iOS 4.
It's easy to manage your WordPress blog from your iPad, iPhone, or iPod touch. With WordPress for iPhone OS, you can moderate comments and create or edit posts and pages. All you need is a WordPress.com blog or a self-hosted blog running WordPress 2.9.2 or higher.
What's New In This Version: New Add Blog feature adds all of your WordPress.com blogs in one easy step Better handling of drafts in progress when quitting the app Performance enhancements, UI improvements, and bug fixes Supports fast app switching in iOS 4. Optimized for the Retina Display on iPhone 4.
You can download WordPress from the App Store for free.