[youtube http://www.youtube.com/watch?v=hDE3E5vSknM&w=420&h=315]
[youtube http://www.youtube.com/watch?v=-UVQ3QLD6Cc&w=420&h=315]
[youtube http://www.youtube.com/watch?v=SmrF3er7zus&w=420&h=315]
It really helps to see finished examples of what others have done. Once again it’s YouTube to the rescue.
Cornell University’s Silo House
Glenburn Silo Home
Silo House aka The Cabin in the Woods (low quality footage but has some good points)