The updates provide additional raw file support for 15 digital cameras including the Canon EOS 50D, Canon EOS 1000D, Nikon D90, and Nikon D700,.
The Lightroom 2.1 update includes improvements to Photoshop integration, Web module stability for Microsoft Windows Vista 64-bit operating systems, performance with 64-bit Mac OS X 10.5 Macintosh computers, and Keyword migration from Lightroom. You can find a full list of improvements in the Lightroom update documentation.
Adobe has also come out with a fresh set of camera profiles available at Adobe Labs (http://labs.adobe.com). Camera profiles are designed to improve Adobe's default raw processing and emulating the color rendering provided by camera manufacturers. The update includes further support for the Leica M8, Canon EOS 50D, Canon G9, Nikon D90 and Pentax models.
Profiles are the visual starting point for the raw processing workflow. Due to the fact that preferences will vary by photographer, Adobe has minimized surprises by providing default camera profiles that closely follow the visual looks that photographers normally see from their cameras.
The 15 new digital cameras supported in Lightroom 2.1 and Camera Raw 5.1 include the Canon EOS 1000D, Canon EOS 50D, Fuji FinePix IS Pro, Kodak EasyShare Z1015 IS, Leaf AFi II 6, Leaf AFi II 7, Leaf Aptus II 6, Leaf Aptus II 7, Nikon D700, Nikon D90, Nikon Coolpix P6000, Olympus SP-565 UZ, Pentax K2000, Sigma DP1, and Sony A900. In addition, Adobe recently released Camera Raw 4.6, which includes the same raw file support for Photoshop CS3 customers.