Just now I was speaking with Gilad Japhet, CEO of MyHeritage.com who reports that an hour ago, all images from the 1940 US federal census are now live on the MyHeritage site. This was accomplished by jumping through hoops, technologically speaking.
This news is so exciting that we interrupted our phone call so I could make this post. You'll find the collection of images at: http://www.myheritage.com/1940census
These images are free, and readily accessible. Ol' Myrt here thinks you'll like the image interface. Try it, you'll like it.
Happy family tree climbing!
Your friend in genealogy.