Adobe has released Camera Raw 6.4 and Lightroom 3.4. You can read about the new supported raw formats, new lens profiles, new cameras supported for tethered shooting, and the list of bug fixes in a blog post by Lightroom product manager Tom Hogarty:
As usual, you can read the release notes and download the installers from
To update Photoshop and Camera Raw directly, start Photoshop and choose Help > Updates.
To update Lightroom directly, start Lightroom and choose Help > Updates.