I decided to port the one you found into a jQuery plugin, which can be found LINK REMOVED - SEE EDIT. It was written up in about 2 hours last night, so is probably riddled with bugs. If you find any bugs, feel free to email me at the email listed in my StackOverflow profile.
Edit: I've contacted the author of the original Mindmap, and my jQuery conversion has become the core of development. You can get it, as well as speed improvements and new functionality here, on the Github page.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
