Not sure what else I can say to make you understand.
Here's a thread with a few people using the case. It doesn't seem to be a problem for them.
http://www.blackberryforums.com/show...392#post151392
P.S. Check out the Motorola Razr, the Nokia 8800. Both recently released high end phones made with metal in the housing.
Oh and how about the Vertu, the most expensive cell phone in the world. Guess what's it's made from? Yep, metal. I'm don't think people are paying $30,000 for phones that don't work.