In MacOSX I can copy an icon from any document/folder/application by doing Cmd-i on the object and then copying (i.e. Cmd-c) the icon and pasting the icon on another object (by bringing up the information via Cmd-i and pasting the icon saved to the clipboard over the original icon).
Is there a way to do this in Ubuntu? I am running 10.04. Gnome 2.30.2