You may download the Blender to Motion script here: http://blenderartists.org/forum/showthread.php?227090-Blender-to-Apple-Motion-export-script
Special thanks to OSXrules at BlenderArtists.org for creating this awesome script! You rock!
If you are new to Blender make sure to watch these tutorials to help get you started: https://cgcookie.com/blender/cgc-courses/blender-basics-introduction-for-beginners/
Please let me know what you think or if you have any questions. Have a creative day!
Also, check out the most recent demo reel from Blender: