that's a Bummer, Are there any other companies that offer Glass as a material? I checked I-materialize but they dont. I'm not sure if there are many others.
You could always print a pattern in FUD or WSF, and then make a mold in refractory clay, or vulcanized silicone and then pour molten glass into the mold. Those parts would come out way better than Shapeways' old glass.wiwa