There is a new tutorial video for Maya on the new Bonus Tools; Extrude and Preserve UVs.
The video is one in a set of films on the Bonus Tools for Maya by Steven Roselle. He is one of the on-staff artists at Autodesk who specializes in Maya and games. He's often the one that Autodesk sends out to directly talk to the artists in the trenches. He's currently in the process of making a tutorial for each of the tools in the pack. Give him some feedback if there's one in there you have questions about.