One of my favorite classes at Autodesk University 2006 (last week) was given by my friend David Garrigues. During the class he described how he had created a CUI with custom Right-Click menus (many commands per object type) and the ability to Double-Pick on an AECC object (Alignment, Surface etc.) and bring up the object's Properties Dialog Box, instead of the AutoCAD Properties Palette. This gives users of this CUI a quicker way to create, edit, interact with, and control their Civil 3D objects. The images to the left show what you see if you bring up the right-click menu while selecting a Surface and Feature Line respectively.
During the class, David mentioned that he would make this CUI available. The simplest way to do so was for him to post it in the "Content Sharing" section of the "Civil Engineering Community" website. It is located in the "Utilities" area of "Content Sharing". It is titled:
"Double and Right Click CUI"
You must be registered and login to the site in order to download this CUI.
Download it and follow the instruction from the readme file to get it installed properly. I have already done so and it makes life a bunch easier.