Thanks to our contact PF108 for the following.
In my excitement for Hurley and Libby, I forgot to mention one thing about the "benifet", Pierre Chang was also in that scene.
On Sat. Jan. 16th, 2010 Desmond and Widmore were filming a scene at The D.H. stadge. Was set in Widmore's office.
Source: PF108@DarkUFO