@peteallport neat idea and the demo vid is cool. I teach at Rollins in Orlando and if you have time, would like you to come present in my New Product Development class.
Moodle or Facebook's Personal Learning Plan integration would open the app up to STEM / Charter / Magnet / Independent High Schools. I can see my kids buying and selling on this.
This is a cool idea! Sometimes it's hard to find exactly what you're looking for when seeking the answer to a question (even googling doesn't always have the answer). This seems like something that will take you past the static published content on the web and give you dynamic answers I'm looking for. Nice work!
Velapp