Hey tdrecordable and welcome!
You're right - noise/vibration is one of the issues in the todo list. Basically a couple of things contribute to it: the way stepper motors are mounted and the stepping mode. The current stepper driver boards use half-stepping mode which is smoother than full stepping but still pretty jerky. Using the stepper driver with microstepping mode (e.g. Makerbot's SMD v3, which we're trying to get our hands on) should reduce the jerkiness. The mounting of steppers is also a factor - for example mounting it on plastic spacers (vs directly to aluminum frame) reduces vibration. Mounting it at 4 points should also be better than at 2 points. In the videos the steppers are mounted at 2 points directly to aluminum frame. Also, if there a loose screw somewhere (e.g. friction adjustment screws on sliding elements), it will add to the noise as well. Btw, this was one of the reasons for switching to plastic screws in sliding elements. Hopefully with all these measures applied, the vibration/noise can be reduced to a minimum.
Also check out this thread: http://www.contraptor.org/forum/t-193480/testing-out-this-concept
Curious, what kind of art project you're working on?