Looking around there are vids of a range of other interesting looking Unity3D projects. Note they seem a little light on characters, though that need not be a limitation of the engine so much as the developers for all I know. Here are a list of interesting ones to check out:
Kyrill : An RPG game under development using the Unity3D engine intended for the browser.
Temple of Zante : Student work
Rig and Locomotion System : tools for character motion
One Night : AFTRS Ian Brown Game prototype
Digital Urban : They throw their city models etc into Unity
Not sure why there arent any Unity3D machinima though…