That "something" is whatever currency is used in the game. Since it is never directly stated, people usually use the terms dwarfbucks, urists, cash or anything that could be a name for it. You can't trade artifacts, even crafts. It makes a room absurdly valuable, though. Great for high-demand nobles.
To destroy a workshop, press {q}uery and {x} for remove. Someone with the correct labor will come along and tear it down.
EDIT: Flashing names mean they are legendary in some skill, any skill, actually. Even social ones.