Control-Left and Right switch workspaces for me. A giant pain in the ass, because the normal word-jump shortcut, Option-Left/Right, just drops a [C/[D into the shell on iTerm. The stupid thing is, if I shell into an Ubuntu machine, it works fine.
You can probably set that up in .inputrc. Pressing Ctrl-V in a terminal before pressing your ctrl+left or ctrl+right arrow will type the initial escape character literally so you can see what the key sequence is (e.g. something like \e[1;5D).
Alternatively, you could change your workspace bindings to Control+[some other modifier].
