The UK Store has just been updated with the following content
Race Driver GRID Demo (Free)
Mirror's Edge Gameplay Trailer (Free)
Guitar Hero III: Def Leppard Track Pack (£3.99)
Guitar Hero III: Muse Track Pack (£3.99)
Army Of Two: SCC Challenge Pack (£3.99)
Thats your lot... so far at least. No Bourne Conspiracy Demo as of yet.