**EDIT: Authorware isn't really designed for websites, but instead is more useful for standalone CD-based training applications. This was the only category I could find about Authorware. :) I've been using Authorware for some time now at work. It really is an incredible package; I occasionally use Flash as well, and really prefer Authorware for its interactivity. Applications are easy to build up using the easy-to-understand flowchart system. Interactivity is implemented with minimum hassle thanks to frameworks, navigation icons and buttons. Its also very easy to track scores and things for quizzes. Overall the interface is very intuitive. Underneath lies a very powerful scripting language which has impressed me somewhat. There don't seem to be many limitations to what can be done - API programming, DSN Database Connections, Web Integration... this functionality is really what makes Authorware 'the best'. I now use authorware to build standard multimedia presentations and sales presenters as well as CBT applications, as the interface is so much more friendly than anything else I've used. Its a little pricey at £2500/license, but it's well worth it for what you get. It may take a while to learn, but stick with it. Its an excellent package which definately deserves more coverage than it gets.
I use Authorware to make educational multimedia applications, and I have to say it is an easy and powerful tool. Authorware has long been popular within the education circle for its ease of authoring courseware and tutorials for schools or university. And the main reason for its popularity is the fact that it takes the burden of learning a programming language off the author shoulder. Instead it captures the concepts of a programming language's in visual form. This allows authors to perform complicated and powerful multimedia applications with Authorware without having to know anything about programming languages. Placing text, pictures, animations, videos and sound files is as simple as importing them into a authorware piece. You can even draw simple pictures using Authorware's drawing tools (very much like you do it in Word 97). For advance users it has a scripting language as powerful as Director's Lingo scripting language which is capable of performing a lot more functions. You can even convert your application into a Web version easily, which can then be played using a Web Player very similar to the Shockwave or Flash player. But if you really intend to use a Web only version of your application, you might be better off using Flash or Director instead. The latest version is Authorware Attain 5.1. Surprisingly this authoring environment is only available for Windows though (sorry Mac and Unix fans). Authorware is very suitable for those with no Windows programming knowledge but wish to produce a multimedia application, especially teaching related applications.