I am the developer at HubPages who built the iPhone app. I hope that others answer your question because I am always glad to hear how people feel about the HubPages iPhone app.
The last feature that we released was photo upload. The next update to the app will allow upload of up to 10 photos at a time from your iphone.
There have been numerous requests for the ability to publish or edit drafts. It is on our list of features to add.
Next month, we will make a decision about the next features to add to the iphone app. Currently, our top priorities are the following:
1. Improving mobile experience on HubPages
2. Fixing bugs on the current iphone feature set
3. Getting the current mobile features to work on android.
The best way for people to help us in setting the priorities is to set start a thread in the Report a Problem/Suggest a New Feature forum section.
Thanks very much for your question.