Computing research has made remarkable advances, but there's much more to be accomplished. The next ten years of advances should be even more significant, and even more interesting, than the past ten. The National Science Foundation has created the Computing Community Consortium to engage computing researchers in an ongoing process of visioning -- of imagining what we might contribute to the world, in terms that we and the world might both appreciate. This process is just beginning. In this program, Ed Lazowska reviews the progress the field has made and presents a number of "grand challenge" problems we should be prepared to tackle in the coming decade.  (Series: CSE Colloquia - 2007)