I've never personally used Kodachrome, as the film was already falling out of favor by the time I began experimenting with color photography. There just weren't many labs that could process it. But the discontinuation of another classic product marks one more step on the march towards an all-digital future. Ars Technica has a nice article about the film's landmark importance to the photographic world. And Kodak has put up an online gallery of Kodachrome images mainly from National Geographic photographers.