In the vibrant neighborhood around 16th Street and Guerrero, a new Italian restaurant is taking shape. As opening day draws closer, construction continues around the clock. Come by and you may hear the squeal of the electric saw, the clattering of lumber, the whine of an electric drill. But, despite the fact that several people are conversing simultaneously, one noise that's notably absent is the sound of voices. That's because the conversations are all in sign language. The owners and operators of Mozzeria, Melody and Russell Stein, and many of their workers are deaf.