My D-LUX 4 arrived today. Initial impressions are very good! I think the D-LUX 4/LX3 is the new low light champ amongst pocket cameras, at least for color photography. The Fuji F31 would be the closest competition, but that camera is a stop slower, and I don't recall ISO 3200 on my F31 looking as good as ISO 1600 on the D-LUX.
I haven't had time to make any good photos yet, but I thought I'd share a quick high-ISO sample. This was taken at the dinner table with Philip sporting a fresh milk moustache. Handheld, 60mm equivalent, f/2.8, ISO 1600, 1/60s. Processed from RAW.