Na-Young Kwon from Microsoft France has made a cool video of the Wikipedia Explorer.
http://blogs.msdn.com/nay/archive/2007/02/03/wpf-wikipedia-explorer.aspx
Video here: http://soapbox.msn.com/video.aspx?vid=1e22a7cc-abe7-4d8d-bc3d-8713c53e9cb7
It didn't look like she had hardware acceleration running (probably because of Camtasia).
Thanks Na-Young, You rock!