It seems like 3d and Flash is getting pretty popular these days. custom:media posted this demo of their 3d Engine SWFZ on their site simulating a 3d shooter. There is another blog entry with thoughts about possible 3d acceleration in Flash.
There are also approaches to combine 3d and Flash Video e.g. the North Face Demo 3d video carousel demo. Hopefully weíll see commercial 3d environments soon. The ABC player or the Nike.com landing page are examples how to use 3d and video, but with the new generation of Flash-based 3d engines there are great new possibilities to create more complex 3d experiences