Wikipedia - a website that indiscriminately allows users to contribute, edit and publish information - is only one of the most widely known champions of the Web 2.0 generation. The unprecedented social networking possibilities of Web 2.0 are opening the doors of the Information Development Industry to anyone connected to the internet. Will online collaboration in the development and dissemination of health knowledge flood the internet with false and potentially dangerous information, or can we harness the Web 2.0 spirit to improve universal access? Can we harness Web 2.0 for health knowledge and, if so, how? Are we heading towards Medicine 2.0?