For the A350-800, Airbus still has no clear answer. It is contractually obliged to deliver the first aircraft in 2016, one year ahead of the -1000, although it has been trying to delay entry into service to around 2020 while redefining the version. Some observers have suggested that the -800 might be killed once the reengined A330 has been formally launched.
It is unclear whether the current official position is only a polite way of saying Airbus essentially does not want to build the aircraft. There are very real concerns that the A330neo makes the A350-800 redundant.