I've used the app twice so far, hoping to really push it this weekend. One thing that needs to be done is different free licensing that matches Wikimedia Commons upload form/wizard (I would rate this as a "need") but also allowing an option of custom licensing for more advanced users (it is a "want" but not important), the app should add the {{location|long|lat}} to files with geo info that is in the EXIF data (more of a "want" than a "need") and there should be an option to add categories, as Wikimedia Commons will have another bigger issue of uncategorised files (this is an very important "need") [example].
Topic on Talk:Wikimedia mobile engineering/Mobile QA/Commons uploads
Great let us know what you find and I'll grab your suggestion to put in our story backlog for one of our future sprints
Didn't get to test it how I wanted to, due to the good old congestion on the cell towers. One thing I've noticed is how much battery it uses on the iPhone, having the app open for 60 seconds seems to eat about 3% (Facebook or the Twitter app is about 1% useage).