"Macromedia’s Flash Player is a remarkable piece of software. It is widely deployed, features a full ECMAScript implementation, an XML parser, audio and video capabilities and an advanced vector rendering engine, and many more. If used appropriately, it can provide visitors of your website with a better, richer and unique browsing experience."
Interesting piece on the Flash plugin and considerations to be made with respect to the average user. They go on to recommend ultimately parsing in XHTML into Flash:
"My advice for anyone planning to develop a Flash enabled website (and you will also get this advice from any ethically correct “Search Engine Optimizer”) is: Structure your site’s content well and create a simple XHTML version before you even touch Flash. Follow best practices for authoring the XHTML."