The iPhone app is up to version 2.2 that iPhone app version numbers do not correlate to WordPress core versions due to separate dev cycles. While the Android and Blackberry apps are brand new. You can write posts, save drafts or publish right away, moderate comments, blog photos from your phone and video on Blackberry and more…
All of these mobile WordPress apps are free and open source. They are developed in the same manner as WordPress core, which means anyone can contribute!