As you probably already know, Panasonic updated the firmware version on its LX3 model to 2.0 (more info and a list of fixes available here).
Leica is also currently looking into a firmware update for the Leica D-Lux 4 camera. In order to maintain Leica’s high image quality, it is necessary to incorporate Leica’s special algorithms during this process. The new firmware will be released, if and when the high quality standards can be maintained and new features can be added without any compromises.
Both LX3 and D-Lux 4 cameras share similar technologies, but have different firmware. The last firmware update (1.2o) for the D-Lux 4 was release on March 23, 2008 (version 1.20 for the LX3 was released 3 months before, on January 17th).