I'll repost a quick summary here :
- System (Windows) key: Switch between overview and desktop
- Alt+F1: Switch between overview and desktop
- Alt+F2: Pop up command dialog
- Alt+Tab: Pop up application switcher
- Alt+Shift+Tab: Cycle in reverse direction in the application switcher
- Alt+[key above Tab]: Switch between windows of the same application in Alt+Tab
- Ctrl+Alt+Tab: Pop up accessibility switcher
- Ctrl+Shift+Alt+R: Start and end screencast recording
- Ctrl+Alt+Up/Down arrow: Switch between workspaces
- Ctrl+Alt+Shift+Up/Down arrow: Move the current window to a different workspace
- Ctrl+Enter: Launch a shell command in a new Terminal window
