For SolidWorks users and others interested in its capabilities, there is a video posted (in WMV format… sorry) here:
http://storeandserve.com/download/3380/SolidWorks_Surfacing_Tutorial.wmv.html (41MB)
Now that a little work’s been done on Blender’s nurbs, I thot this may be of interest to some to show how one professional tool gets the job done. Get some ideas percolating, if nothing else. Enjoy!