Teapotters is to 3D what Flickr is to pictures. You can interactively look at 3D models, post your own models, assign tags, apply different shaders, and download the file if needed. You can also embed the player to show a particular model on your blog for example 😉
Teapotter uses the Virtools 3D Life Player (formerly known as the web player).
It’s still in private beta, [but I’m told it’s easily accessible, and you can see/download the 3d models without having to sign up]. Here’s the official presentation video :