It appears that Unity on Raring only comes with a single virtual desktop (aka workspaces) by default, and CCSM's Wall plugin has no way to add more. Is this configurable at all?
Ubuntu – How to turn on workspaces? (Why do I only have one workspace?)
unityworkspaces
Best Answer
for 13.04 and later..
Workspaces are disabled by default in Ubuntu since 13.04. To enable them, open Appearance from the dash:
Switch to the behaviour tab and check "Enable Workspaces".
If you want to hide the workspace switcher see this question.