Gamestar has recieved word that the next line of ATi graphics card, the 9900 (Pro), may be bundled with Half-Life 2. The article (Sketchy translation) goes on to speculate that there may be a "strategic partnership" between VALVe and ATi forming.
They also mention that the "gone gold" date for Half-Life 2 will be September 13th, however, they don't have any evidence to back that up.
Thanks to nietzsche for finding this.
UPDATE: The bundle has now officially been confirmed by The Inquirer, but the Radeon 9900 has undergone a name (or number) change to the 9800XT.