I wanted to write about BitFlux several months ago. I first heard this tool from a New Zealand friend - Brent Simpson. BitFlux is a browser (currently mozilla only) based WYSIWYG XML Editor. I know I know, there are lots of WYSIWYG editors out there. But what's worth to mention about BitFlux is that it allows editors to instantly edit any web pages at its EXACT look and feel. It is the really "What You See Is What You Get" editor. Here is how it works: you goto a website using a FireFox, and press "F7" to invoke BitFlux editor, then you will see all of the texts, links and images being outlined by dashed boxes. You can simply click on the boxes and change edit the components (type new text, change images, edit the links etc...).
The application is written in JavaScript and uses XML, XSLT, and CSS for rendering. It is usable with any XML document and features tables, lists, images, special chars, clipboard, undo/redo, and easy customization. I strongly recommend you try it out yourself and I guarantee you will be amazed of its functionality!
http://bitfluxeditor.org/
BitFlux Screen Capture