Unity3d
From John Freier
Unity 3D
2D Information
Camera
Change camera mode for Projection from Perspective(2 eye camera, so the sides will show) to Orthographic (1 eye camera).
Reference http://docs.unity3d.com/Documentation/Components/class-Camera.html
YouTube Videos
Unity 2D Game Tutorial - Part 1 Sprites and You. http://www.youtube.com/watch?v=DZucUpZtg2U