WordPress App for iPhone and iPod Touch has been officially release. At the moment, it is only available in the US iTunes Store, give it some time for it to propagate to the rest of the iTunes stores.
It is a free app and I recommend everyone who is using WordPress and has a iPhone or iPod Touch to get it.
Here is what it does (taken from Weblog Tools Collection):
- Support for WP.com blogs and self-installed blogs version 2.5.1 and higher
- Embedded Safari for true previews of posts
- Full tag and category support
- Photo support for both camera pictures as well as library photos
- Support for multiple blogs
- Ability to password protect a post, save as a draft, or mark the post for later review
- Auto-recovery. This will recover posts which have been interrupted by phone calls