Two of the major review sites have added full-resolution Panasonic LX3 samples.

Digital Camera Resource has an LX3 "Maui Gallery" containing mainly low ISO images. There is a RAW conversion versus in-camera JPEG comparison at the end, which also includes the RAW file for download.

Imaging Resource has added the LX3 to their excellent Comparometer, which allows comparisons of in-camera JPEGs from different cameras under controlled lab conditions. They have also posted a full set of their usual test images.

Unfortunately the Nikon P6000, Ricoh GX200, and Canon G10 are not yet in the Comparometer.

Links:
DCRP: Panasonic Lumix DMC-LX3 Maui Gallery
Imaging Resource - Comparometer
Imaging Resource - Panasonic Lumix DMC-LX3 Test Images

My take on LX3 vs the competition in the Comparometer:

• Compared at ISO 80, the in-camera G9 JPEGs contain significantly more detail than the in-camera LX3 JPEGs. From samples I've seen to date, I expect that the G10 will likewise be class leading in overall detail capture.
  
• The LX3 high ISO JPEGs in the Comparometer clearly outclass the G9 high ISO images. To my eye, the LX3 also outperforms the Fuji F50fd and Sony W300 at high ISO. Panasonic seems to have arrived at a nice balance between detail preservation and noise removal with Venus IV in this camera.
  

Given that the LX3 also boasts a faster lens than any of its competitors, it will likely stand alone in low light, high ISO performance amongst current model small sensor compacts, at least from the standpoint of a JPEG shooter. I expect that LX3 RAW files will also exhibit greater dynamic range than most competitors, including the G10, but look forward to putting that to test.