Web 2.0
Web 2.0 describes an emerging web trend. Until recently a web site normally consisted of a set of pages containing information (hopefully) useful to its readers. That's now being termed Web 1.0.
We now see a new type of site or service (i.e. rss), exemplified by Google Maps, Flickr, Del.icio.us in which content (often supplied by users) is repackaged with added functionality. A web site becomes a web application. The web becomes a platform. This is being termed Web 2.0.
Example: TagCloud
Tagcloud is a Web 2.0 site that lets you select a series of rss feeds from blogs and web sites. It takes the feeds, analyzes the keywords and plots them graphically for you. Here are two I've created.
Web 2.0 articles
In LangfeldesignsTalk you'll find articles on Web 2.0 topics. Here are some of them: