Adobe Camera Raw 5.6 and Lightroom 2.6 are now available for download from Adobe Labs. These releases add new camera support for the following models:
Canon EOS 7D
Canon PowerShot G11
Canon PowerShot S90
Leaf Aptus II 5
Mamiya DM22, DM28, DM33, DM56, M18, M22, M31
According to Camera Raw/Lightroom PM Tom Hogarty, "The Lightroom 3 beta has not been updated with this new camera support. If you're working with one of these newer cameras and the Lightroom 3 beta, please use the DNG Converter 5.6 Release Candidate to convert proprietary formats to DNG files that can be used in the Lightroom 3 beta."
Because this is a release candidate, we'd be glad to get your feedback via the Camera Raw User to User forum.