The document advertises a Random Hacks of Kindness (RHOK) and Open Data Hackathon event in Birmingham on December 4-5, 2010. The event will bring together volunteers including developers, designers, and experts to build software applications using open data to help address real-world challenges. Participants will work on projects like crisis mapping and data visualization tools. Over 80 cities worldwide are participating in RHOK events, including locations in Europe, North America, Asia, Africa, and South America. The goal is to have fun while using technology to make positive change.