That dodgy term Web 2.0 is difficult to pin down, and this is mainly because it carries such varied meaning across its usership. Most will agree, though, that drag-and-drop usage is clearly a feature of Web 2.0.
As we explore some ideas for using drag-and-drop that will assuredly increase the "ooh that's slick" rating of our sites, we keep in mind those that are disabled and may need to navigate using a keyboard and not a mouse. The scope of the book, however, is MooTools, so the graceful degradation will not be evident in the recipes. Attempt to always include it in your applications.
That being said, what type of cross-browser compliant drag-and-drop action will we be pursuing in this Chapter?