Is there a starcraft2 demo

I dont think so. Check www.isohunt.com there i downloaded something called Starcraft 2 Demo.rar and it is 700mb, cant open it, needs password. Check out on own risks, i cant open it so i will delete it. If there was a demo for SC2, then it shoulod be available from Blizzard's official sites and servers. They said it would come in summer 2009, or fall. You can only play if  you were blizzard employes otherwise we wait like the rest of the world.