Samsung published flyer of its 1.34um BSI pixel-based 16MP sensor, the S5K2P1, announced in Sept. 2011. The flyer has Macbeth pictures in normal and low-light modes (lens is not specified):
Having SNR of 35dB at 40% gray level means that this 40% signal is at least 3100e-. Then the 100% signal can reach 7.7Ke-. If true, it's quite an achievement for that small pixel.
Correction: As written in comments, the gray level is closer to 20% (19.8%, according to Poynton). Then the full well should be beyond 15Ke-, hard to believe. The flyer only mentions on-chip bad pixel and lens shading corrections, says nothing about noise reduction.
The production schedule seems to be delayed as compared with the September announcement. The flyer says that the S5K2P1 is sampling now with volume production scheduled for Q1 2012.