I submitted one item on a lark the day before the deadline, in the hour of downtime I took after I finished playing World of Warcraft and Hearthstone to eat dinner.
It survived two rounds of culling before it succumbed, and I am quite certain as to why it got shot down at the third pass; I'll see if I'm correct later. I kept my design simple, avoiding excess description (so a GM could make it fit his campaign as he sees fit, be it Golarion or something else) as well as excess detailing.
It was an obvious thing that would logically happen once a magic-using culture reached a given critical mass of usage in that form of magic, and would be desired by those who could get them. I may have screwed up the gold pricing, but that's about it.
I should have included the other half of the full concept as another item submission, but I'll reserve that for next time.