Web 2.0, a phrase coined by O'Reilly Media in 2003, refers to a perceived second generation of web-based communities and hosted services – such as social-networking sites, wikis and folksonomies – that facilitate collaboration and sharing between users.
Technologies such as weblogs, social bookmarking, wikis, podcasts, RSS feeds (and other forms of many-to-many publishing), social software, Web APIs, Web standards and online Web services imply a significant change in web usage.
In the end, the bottom line boils down to one concept: openness. Openness in business practices. Openness in classrooms. Openness in software and applications. The more we share, the more we benefit. Give away some power, some information and get so much more back.
Concise Web 2.0 Explanation http://web2journal.com/read/165914.htm “Web 2.0 is the network as platform, spanning all connected devices; Web 2.0 applications are those that make the most of the intrinsic advantages of that platform: delivering software as a continually-updated service that gets better the more people use it, consuming and remixing data from multiple sources, including individual users, while providing their own data and services in a form that allows remixing by others, creating network effects through an “architecture of participation,” and going beyond the page metaphor of Web 1.0 to deliver rich user experiences.”
Web 2.0 in Education http://www.slideshare.net/u2katrina/iol-2007-web-2-0