I'm running a Snow Leopard Host on a MacBook Pro, and a Lion Guest. I'd like to check out Lion before installing on my main system. Shared Folders seems to work for a short time after boot, and then it tells me I don't have permission. The internet works, however: I can use Safari at will. I have "All Disks" selected in Configure > Sharing. I don't have "Map Mac volumes to vm" set. Anyone else see this? Any ideas?