I think I may have found the computer I would have recommended for my grandmother. In fact, I think it would recommend it for my parents.
I would have to play with it some before expanding my recommedation, but I think that I would recommend it for most anyone who wants a home desktop machine, who's not doing heavy software development, heavy video editing, or playing super-graphics-cards games.
The no-moving parts, if it breaks, they ship you another one and you've lost nothing, is pretty cool.
And literally cool is that it's silent, and only draws 10 watts. The annual power bill for a desktop machine can easily be greater than the purchase price.
http://www.zonbu.com/home/index.htm