For me is Jon Udell’s Socially Innovative Uses of Technology – A Year in Podcasts. From that list:

Barbara Aronson: Making medical research literature available online, at low or no cost, to poor countries. (blog)

Ken Banks: Using SMS to create communication networks in Africa and other places ill-served by the Internet. (blog)

Gardner Campbell: Using the tools and methods of Web 2.0 to reimagine higher education. (blog)

Mike Caulfield: Bootstrapping and running a state-level community-based political blog. (blog)

Brian Dear: Enabling performers to measure and respond to demand for personal appearances.

Greg Elin: Extracting, reformulating, and making sense of the operational data of government. (blog)

Beth Jefferson: Federating the online catalogs of public libraries, and pooling the participation of patrons. (blog)

Ned Gulley: Designing problems to be solved by gameplay that teaches advanced skills using an optimal mix of cooperation and competition. (blog)

John Halamka: Modernizing the exchange of health care information, and putting patients in charge of it. (blog)

Timo Hannay: Bringing the tools and methods of Web 2.0 to the scientific world. (blog)

Ed Iacobucci: Creating a decentralized alternative to the hub-and-spoke air travel system. (blog)

Doug Kaye: Helping volunteers capture and publish audio recordings of civic events. (blog)

Matt MacLaurin: Recapturing the joy of creative expression in software, in a game inspired by LOGO and implemented using modern software principles. (blog)

Hugh McGuire: Bootstrapping and running a collective effort to record and publish public-domain audiobooks. (blog)

Simon St. Laurent: Chronicling the civic and political life of a small town. (blog)

Jim Russell: Analyzing the dynamics of the Pittsburgh diaspora. (blog)

Greg Whisenant: Enabling cities and towns to publish crime data online, and imagining the citizen/government collaborations that can flow from that. (blog)

John Willinsky: Advocating open access to academic literature, and reimagining education in the era of Net participation. (blog)

Jeannette Wing: Explaining why the principles of computational thinking will become part of everyone’s educational foundation. (blog)