See a list at http://www.airliners.de/community/frame.php?redirect=%2Fcommunity%2Fviewtopic.php%3Ftopic%3D8224%26forum%3D8%2624
Please mind that this list is not confirmed. My guess that some are just wishfull thinking.
First of all the Air Koryo IL62. I posted the info that North Korea has been invited to Davos by the UN. The poster of the list, Viasa, kind of suggests it is confirmed they come, and even knows it is an IL62 of Air Koryo.
Secondly, even if someone comes, president of Peru for example, it might be that he comes by a regular scheduled service.
I believe the list when I see the aircraft myself. As far as I know only the Mexican B757 is most likely to come.