Impress Watch, a Japanese technology site, has shared a number of full-resolution ISO 100 samples from a pre-production FZ18. Their preview can be found here. With the exception of the three shots taken through a ton of atmospheric haze, the samples show excellent "per pixel detail" throughout the entire zoom range. In my opinion, a very impressive job by the lens considering the pixel pitch. The downsides to this camera are predictable (poor high ISO performance, poor dynamic range), but its good to see early indications that this camera will otherwise deliver the goods.

Direct links to full-resolution image samples:
4.6mm (full wide, 28mm equivalent) f/4
19.7mm f/7.1
31.3mm f/3.6
65.3mm f/3.6
82.8mm (full tele, 504mm equivalent) f/4, Sample 1
82.8mm f/4, Sample 2
82.8mm f/4, Sample 3

I'm really looking forward to this little camera.