I was wondering if the Glowforge team has tried to do any sintering with the Glowforge? I’m not sure what you can do with the 40/45W laser, but it would be really cool to make some glass objects from sand!! My initial guess at a problem you guys might face is the exhaust, it could just blow the sand around too much for this to be able to work. Otherwise, I think it would be a really cool experiment to try.
If it works, I could see myself engraving something into wood, filling the engraving with a colored sand/powder and sintering it in place.