I am looking for a cool mouseover script that would work similar to www.ted.com

When someone hovers over an image or text, the description should appear. There may be clickable links, different fonts, colors, styles in the description itself. More or less similar to the TED homepage. TED guys are using a flash based solution. It would be great if the same can be replicated using javascript.

I am NOT looking for a tool tip type effect which just displays info about the image neither the HTML "title" tag.

Please help!