The beta period for version 3.3 of the Camera Raw plug-in for Photoshop CS2 has now ended, and the official release has been posted on Adobe's download servers. Support for the processing of RAW files from 17 new cameras has been added since v3.2, including the Canon EOS 5D, EOS-1D Mark II N and EOS 20Da, as well as the Nikon D200.
In addition, there is a noticeable improvement in the rendering of fine detail (at least with files from the newer cameras we've tested it with, and with the plug-in's various noise reduction controls set low or off). JPEG, TIFF and PSD files saved directly from the plug-in will also now contain caption metadata in both XMP and IPTC formats, instead of just XMP as before.
The Camera Raw 3.3 Read Me contains additional information about the changes.