Finally, there is an offical Wordpress app for Android. But that is very similar with wpToGo,such as managing the comments and adding new posts. But it got a better interface and bit more features.

Comments

It got an tags interface,included Comments, Posts and Pages. That is much better than wpToGo. I remember it only can manage the comments and posts.

Posts

Pages

Those tabs are simple and clean. Moreover,long holding on the item will call its actions menu, such as approving the comments.

Also, same as wpToGo, you can add a new post.

Both of wpToGo and Wordpress App got a very similar interface in this section.
In conclusion, this app can allow the users to manage their wordpress blog in an Android phone and easy to use. I quite like their interface. But I am not sure whether that is my mobile network problem or the app can handle the xml files from the wordpress web services. The app is very slow. Maybe, it gets all comments and pages every updates(It should only get 5 or 10 latest items).
Related Links:
Wordpres for Android