This is The Switch. It's half pepper shaker, half salt shaker, and entirely something I wish I'd thought of years ago.
From Fred, Switch is and adorable white box that lets you flick back and forth between pepper and salt as needed (or just, you know, for fun). Both exit through the same holes, through a healthy blend of engineering and witchcraft. No price available yet, but Switch should be available sometime this spring. [Fred via Wired]