In the course of searching, I also came across this amazing shot, also of Half Dome, but taken from Turlock in the central valley. Like most commenters, I wouldn't have guessed you could see Half Dome from the floor of the valley, let alone so dramatically.
Interestingly, the photo seems to have sparked a lot of accusations of fakery (for example, here and here and on flickr), prompting others to bust out the Google Earth proofs that, yes, this view is possible (although unlikely due to the constant air pollution and crappy visibility). Part of the confusion is stems from the fact that this photo was taken using a serious, pro-grade telephoto lens, so the scene is highly magnified.
At any rate, two examples of what can be done with serious optical systems.