Anton said that there will be a demo on 360 and PS3.
I doubt that the MP will be present in the demo. The demo of Battlestations Midway proposed an MP, the problem is that the players dragged it to the final don't buy the game.
Hawx demo didn't propose MP, developers put the best mission of the game to the demo and to make envious at players. Finally, most people were disappointed to have to buy HAWX then they had tried the demo.
I don't think it is a good idea to put an MP in the demo of Il-2 BoP.
By against, I am interested to know if there will be the simulation mode in the BoP demo?
(sorry for my bad english)