Having at one time been a student of CAD, this is a pretty awesome demonstration of a new utility being developed for Second Life.
This new utility will allow for the importing of AutoCAD drawings into Second Life as fully 3D models built from prims. The video gives a good demonstration on how this works:
There’s a link to the company that is working on this, but the webpage is in Spanish. I’ve included this link using Google to translate to English.