Some architectural firms are starting to use Second Life as a professional tool for architectural collaboration, presentation and communication with clients. With SL it is easier to communicate designs to clients as they are able to walk into the built design concepts and have meetings sitting inside the designs instead of describing drawing over the phone. The more virtual models enable clients to interact with them and make changes to them.
Autodesk have already started an island on SL and softwares which import AutoCAD models into SL have already been developed. One particular software "Henshin" will be available soon. Below is a demonstration video showing how to import AutoCAD models into SL using Henshin.
For further info: visit The ARCH blog post on Second Life and Architectural Practice and New World Notes blog post on AutoCAD into SL