MacRumors.com

Spymac notes a small mixup which supressed early information about Exposé and inadvertantly brought Piles to the forefront in the rumor scene.

MacEdition first wrote about a new feature called "Piles" -- and even linked to weblog describing Apple's old patent -- Piles.

MacEdition, however, went on to describe Expose:

Mac OS X 10.3 will finally see the implementation of the “piles” interface concept patented by Apple back in the dear, dead days of Copland but never delivered to the desktop. The feature, which has been lobbied for by Bruce Tognazzini and other interface curmudgeons, is designed to ease the clutter of windows in the Finder: The Blade’s sources indicate that extraneous windows will shrink and jump out of the way automatically, rearranging themselves into scaled-down tiles in response to the user’s movements.)

This description was later lost after more detailed descriptions of Apple's Piles Patent emerged, and overtook the rumors.