Adobe has made available the 2.6 Release Candidate of Lightroom prior to it official upgrade designation. This is standard procedure for them with new versions that are about to go live. This final 'check' with users is normally followed in short time with an official automatic distribution.
It is available at the Adobe Labs website at this link:
http://labs.adobe.com/wiki/index.php/Lightroom_2.6
New camera support is the primary feature of this incremental version which is/will be echoed in the Adobe Camera Raw, DNG converter, and other software supporting RAW files from Adobe. List below.
There are some differences listed at the above link between the Mac and the Windows version. The main difference is the Windows version will replace the current 2.5 release whereas the MAC version installs in parallel.
New Cameras include:
CANON
- EOS 7d
- PowerShot G11
- Powershot S90
LEAF Aptus II
MAMIYA D and M Series (several)
NIKON D3S
OLYMPUS E-P2
PENTAX K-x
PANASONIC FZ38
SIGMA DP1s
SONY
- A500
- A550
- A850