There are a number of places out there with good industrial design tutorials. Here's the start of a list, I'll try to add more, if you know of any others feel free to post them.
Tutorials by Feng Zhu
Tutorials at CarDesignNews (at the moment there's only tuts in the archives)
Tutorials at ProductDesignForums (including a bike tutorial based on the Scott Robertson one which used to be available here)
How To Design Steampunk Machines (covers making steampunk designs believable by basing it on working steam technology)
IDW on Facebook!