Adobe has made release candidates of Lightroom 3.3 and Camera Raw 6.3 available for download in Adobe Labs.  These versions add RAW file support for the following cameras:

• Nikon D7000
• Nikon Coolpix P7000
• Nikon D3100
• Canon PowerShot S95
• Canon PowerShot G12
• Panasonic Lumix DMC-GH2
• Samsung NX100
• Samsung TL350 (WB2000)

A number of new lens profiles have also been added, along with several bug fixes.  Additional release notes are indicated on the respective download pages for each product.

Remember, these are release candidates, which means they’ve been pretty well tested and Adobe thinks they are ready for full release; however, it’s recommended that you keep production work to prior versions until the official releases drop.  Expect those to come soon though.  Release candidates mean that the final versions are just around the corner.

Lightroom 3.3 release candidate can be downloaded here.

Camera Raw 6.3 release candidate can be downloaded here.