Thanks to Moguri and Kupoman, orthographic shadows will soon be available in Blender. Here is a pic of the old way using Blender 2.63a
The 2.63a shadow was done using a spot light. Here is the shadow panel.
The blend files can be downloaded at: http://www.mediafire.com/?18il3o06x8e8045 and
This was done using a MacBook Pro with Intel HD Graphics 3000 512 MB.
Comments and corrections are welcome. The idea for doing the shadow is from:
Here is the link on the BlenderArtists forum: http://blenderartists.org/forum/showthread.php?256306-Orthographic-Shadows