Two excellent Web 2.0 initiatives  for development and social change that that embody all that is exciting about this new collaborative technology:

ShareIdeas.org is an online community and a wiki for sharing ideas on how to use mobile communications for social and environmental benefits. ShareIdeas.org belongs to the growing global network of individuals and organizations that use this virtual gathering place to communicate - and collaborate.

Focuss.eu provides a high quality search engine for practitioners, researchers and students in the area of global development studies. Other than generic search engines, like Google and Yahoo, focuss.eu indexes a specific choice of electronic resources, selected by librarians, researchers and practitioners working in participating institutions. The resources are selected based on their relevance for the development studies and the quality of the information. Since its inception in October 2006, a number of development-oriented academic centres and organisations have started adopting and promoting this tool more widely.