Not sure whether it has already been posted, but Lightroom 4.1 is final
and has been released: http://www.adobe.com/support/downloads/detail.jsp?ftpID=5393%22%20target=&PID=3485381
The Adobe® Photoshop® Lightroom® 4.1 update includes these enhancements:
• The ability to process HDR TIFF files. (16, 24 or 32-bit TIFF files)
• Additional Color Fringing corrections to help address chromatic aberration.
• Save photobooks created in the Book Module to JPEG
• Publishing photos to Adobe Revel is now accessible via a Publish plugin
• Additional camera support for several new cameras including the Canon EOS 5D Mark III, Fujifilm X-Pro1, Nikon D800, and Olympus OM-D E-M5.
• Corrections for issues introduced in previous versions of Lightroom. "... support for several new cameras including the Canon EOS 5D Mark III"
: not that it helps much here in Europe, a continent which Canon seems to have forgotten when it comes to shipping 5D3s.