Lightroom 2.3 is now available as a Release Candidate on Adobe Labs. It fixes the memory leak issue, CD burning on Windows issues, and a few others. In addition this version now has additional languages available: Chinese (Simplified), Chinese (Traditional), Dutch, Italian, Korean, Portuguese (Brazilian), Spanish and Swedish.
To coincide a new version of Camera Raw is available. Both Lightroom 2.3 and Camera Raw 5.3 add support for the Nikon D3X and the Olympus E-30.
More information can be had at the link pages and from Lightroom Journal.