The book's main focus in on AJAX as a technology and not on a particular framework. We have used script.aculo.us in order to show what level of complexity an existing AJAX framework has reached. The example shows how easy you can develop some interesting user interface with an existing framework without going into the details of script.aculo.us itself.
SVG (Scalable Vector Graphics) is a language for describing 2D graphics and graphic applications in XML. It is a open standard from W3C http://www.w3.org/Graphics/SVG/
Currently, only Opera and Firefox natively support it, while Safari and Internet Explorer require a plugin. The most widely used plugin is Adobe SVG http://www.adobe.com/svg/ and its supports the 1.0 and 1.1 official specifications.
Regarding the applications that use it: - Adobe Illustrator allows both the import and export of SVG images - the Batik SVG Toolkit can be used to manipulate images in Java
There are also implementations for mobiles: Ikivo, Bitflash or Intesis
Oracle for example introduced a new SVG rendering module for its web applications.