Spotlight. Unix. Getting started (or reacquainted) with Quicksilver. Hack Attack: A beginner's guide to Quicksilver - Lifehacker Adam Pash has written a terrific introduction to Quicksilver that I recommend for folks who are still scratching their heads about what all the fuss is about.
Part of the challenge is the "layers of the onion" problem. Quicksilver: The power of compound commands.