Fuji NPZ 800 is out for a while...u can purchase it at Ruby, Pennisula. Cheapest place to buy.
NPZ 800 has wide exposure latitude, however, grainy beyond +/- 1 occurs. Good skin-tone rendition, true colour replication and excellent contrast. However, colors not very saturated (lest the skin colours look ghostly).
Personally, I had tried it and it fares reasonably well. However, I can't notice any difference between this and Fuji 800 X-tra.