
Contrary to what happens with Creative Suite software and Photoshop Lightroom, Adobe announced yesterday that it does not plan to discontinue support for PowerPC Macs in the case of Camera Raw.
According to John Nack, updates to Camera Raw for PowerPC Macs will continue to be released to Photoshop CS4 users throughout the Creative Suite 4 lifecycle, as in past versions.
This FAQ about Adobe products clarifies all the details about your abandonment of the PowerPC platform support.