I would like to move the Workspace switcher icon from the bottom to the top of my Unity dock bar. Is this possible? Drag and drop does not work. Thanks!
Short answer: Only for Unity 2D
Not for Unity (3D), not without modifying the source code. For Unity 2D, see @Matt2's answer just above or below this one.
If you want to modify the source code, download
Keep an eye on this: https://bugs.launchpad.net/unity-2d/+bug/761155
There is a workaround for unity2d as described at http://www.tuxgarage.com/2011/10/customizing-unity-2d-ubuntu-natty.html
find this section:
You can rearrange these. Please remember that this fix only works with Ubuntu 2d