I've just discovered something I'm going to LOVE in Ubuntu ...
Ubuntu Desktop Workspaces
The Ubuntu GNOME desktop supports multiple desktop workspaces (these are essentially individual screens which the user can switch between to avoid having to have all applications cluttered onto one screen). Switching between workspaces is achieved by clicking on the workspaces in the bottom desktop panel. The image below shows the panel from a desktop with two workspaces:
By default, Ubuntu configures two workspaces. To increase the number of available workspaces, right click with the mouse on the workspace control (as shown above) in the panel and select Preferences. Simply increase the Number of workspaces value to the desired number.