Marking menus are used throughout a range of softwares from a company called Alias (now owned by Autodesk), popularly known for the 3D modelling and animation package "Maya", and Automobile surface generation product "Studiotools"
Despite the wholesome praise the above products receive for the speed and efficiency of marking menus, no other product in similar category has copied the idea, despite copying being rampant in the industry.
It is quite possible that the technique is patented, preventing other big software houses from copying it.
Strongly suggest the copyright / patent angle should be looked at before incorporating the method.
If there are no patent issues, I whole heartedly recommend its inclusion into OOo. I use marking menus on a everyday basis, and find them irreplaceable.