I'm pretty sure I saw that interface during the SVG Wow portion of the SVG Open.

To see many of the latest SVG goings on, check out this years schedule: http://svgopen.org/2011/registration.php?section=conference_...

I'm working on a web based SVG suite for industrial monitoring and analytics, to displace ActiveX in enterprise settings. Building an SVG WYSIWYG has been the most interesting part. And now that I don't have to support IE8 and below, I'm dumping svgweb (a novel but slow flash shim), and making it an HTML5 suite with SVG and HTML intermingled.

It's a couple years old, but this site also uses SVG for its rendering, though not in an animate-y way: http://emacsformacosx.com/