Re: Still no way to test Gnome-shell in Virtualbox?
Did you install guest additions? I haven't used Virtual Box in a while but 4.0 supports guest additions in Linux and it's somewhere in the menu and it runs as a removeable disk. Once installed you should be able to set up 3D acceleration.
Though, if I'm not mistaken, Unity requires 3D, but gnome-shell does not and it should revert to that by default if you don't have 3D acceleration enabled. There were also rumours of gnome-shell being pulled out of Natty for now, there were also rumours of Unity going to support 2D as well. Not sure of all the facts.
Intel Core i7 970 6/12 (Cores/Threads) 3.2GHz 12MB Cache
6GB DDR3 1866MHz RAM | ATI Radeon HD 5770 1GB GDDR5
60GB SSD (/) | 1TB 64MB Cache HDD (/home)
Ubuntu Oneiric Ocelot 11.10 x64