Thanks to DarkUFO reader Nick for the following.
Hey Dark. Was back at my dad's office today accross from where they shot the Ben/Widmore and Widmore/Sun scenes. One of my dad's mates, another lost addict, said that he had gone down to the set to see what was going on about a month ago and was told by one of the people working there that they were told to keep all the set pieces from the Widmore scene in storage as they were going to be used later on. Thought this was interesting and that we might be seeing Widmore's apartment in the near future, maybe directly after his meeting with Ben. Nicky
Source: Nick@DarkUFO