For anyone who might interested in this lens, I found this:http://translate.google.com/translate?sl=ja&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fdc.watch.impress.co.jp%2Fdocs%2Freview%2Flens_review%2F20120524_534810.html
Google translation is kinda weird, but the pictures speak by themselves. Looks like it fares very well on the hungry D800's sensor, and the bokeh is very smooth.
For those of you not familiar with the brand, as far as I know these lenses are now manufactured by Cosina in Japan, who also manufactures Zeiss lenses. The difference is that Voigtländer lenses are designed and manufactured in-house by Cosina, whereas the Zeiss are manufactured according to Zeiss design and QC specifications. In practical terms, you can expect the same level of build quality.
To my understanding, as a consequence of the very small size it lacks a floating element, so IQ in close focus tends to deteriorate.
For the price though - half the Zeiss 28/2 - I'm almost sold. It's available in Canon and Nikon mount, both of them chipped and with AV coupling.