I've been upgraded to Gnome 3.
Where are Activities?
The Activities Overview is a key feature of the GNOME 3 desktop. Accessible through the Activities button, top-left hot corner or windows key, it is the portal to all your computing activities. The overview allows you to see all of your windows at once and can be used to switch between tasks and launch applications.
I can't see the button or hot corner, and I don't know what windows key is being talked about. Top left I have Applications and Places. There is nothing on the desktop - it's just a stripy no-go area.

