Nmap just created a visualization engine based on Alexis.com data which lets you navigate the web’s most trafficked websites. Definitely worth a look even though the servers seems to be over capacity right now, due to all the traffic from Mashable.
Do you know bestiario.org? If you don’t you should check it out now. Bestario features the latest in visualization techniques, displaying boring data in mind-boggling arrangements
Sam Lawrence of Jive Software has a blog and some mad visualization skills. Good thing we don’t have him as a client, he’d make better flow charts that the lot of us. 
Check out his awesome visualizations on types of human connectedness.
As far as interactive 3D visualization goes, this animated tour of the restored Grand Palais in Paris in one of the best I’ve seen lately. It features a super-realistic flythrough with call-outs, an easy movable timeline and on-demand narratives. On The Favorite Website Award, it made Site of the day.
Grand Palais
http://www.grandpalais.fr/visite/en/#/the-exploration/
