Looks like you need to add a duck. Just keep adding features till they accept it. Example: simple form that lets you take a picture of yourself, type a note about your mood, and share it on Twitter or Facebook, as well as link to the graph.
For instance, I'll bet ya that allowing people to share their moods on Facebook leads to measurably different and likely less accurate mood graphs.
You know you're close to swapping when the duck is upside-down...
[1] http://i1.ytimg.com/vi/-lOiPGHXH3k/hqdefault.jpg (a little overlarge)