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There is a debate over the use of Web 2.0 technologies in mainstream education. Issues under consideration include the understanding of students' different learning modes; the conflicts between ideas entrenched in informal on-line communities and educational establishments' views on the production and authentication of 'formal' knowledge; and questions about privacy, plagiarism, shared authorship and the ownership of knowledge and information produced and/or published on line-
Web 1.0Web 2.0
DoubleClickGoogle AdSense
OfotoFlickr
AkamaiBitTorrent
mp3.comNapster
Britannica OnlineWikipedia
personal websitesblogging
eviteupcoming.org and EVDB
domain name speculationsearch engine optimization
page viewscost per click
screen scrapingweb services
publishingparticipation
content management systemswikis
directories (taxonomy)tagging ("folksonomy")
stickinesssyndication

Web 2.0 can be described in three parts:

  • Rich Internet application (RIA) — defines the experience brought from desktop to browser whether it is from a graphical point of view or usability point of view.
  • Web-oriented architecture (WOA) — defines how Web 2.0 applications expose their functionality so that other applications can leverage and integrate the functionality providing a set of much richer applications. Examples are feeds, RSS, Web Services, mash-ups.
  • Social Web — defines how Web 2.0 tends to interact much more with the end user and make the end-user an integral part.

As such, Web 2.0 draws together the capabilities of client- and server-side software, content syndication and the use of network protocols. Standards-oriented Web browsers may use plug-insand software extensions to handle the content and the user interactions. Web 2.0 sites provide users with information storage, creation, and dissemination capabilities that were not possible in the environment now known as "Web 1.0".

References 

For example, in the Talis white paper "Library 2.0: The Challenge of Disruptive Innovation", Paul Miller argues

Blogs, wikis and RSS are often held up as exemplary manifestations of Web 2.0. A reader of a blog or a wiki is provided with tools to add a comment or even, in the case of the wiki, to edit the content. This is what we call the Read/Write web. Talis believes thatLibrary 2.0 means harnessing this type of participation so that libraries can benefit from increasingly rich collaborative cataloging efforts, such as including contributions from partner libraries as well as adding rich enhancements, such as book jackets or movie files, to records from publishers and others-