A fun project for the online gaming community 'Eve Online'. Eve Online is a very interesting space MMO that has big data market analytics and a detailed in-game items marketplace. Eve-Business.com is a Ruby on Rails website that will organize players in-game market data from the Eve Online API. The website is a great tool for traders and miners that want to see visual graphs of where their money is going.
Eve Business has some pretty detailed graphs and gives the player the ability to track purchases from specific player/corp/region. Currently the database has around 15+ million rows of data from events in-game.