The issue of grad student unions is a tricky one. The government has continually said that they can't unionize. No one at their schools care. And they want a union for something they're paying to do. It would be hard to listen to auto worker's complaints if they paid hundred of thousands of dollars to live in Detroit and make cars. On the other hand: being a grad student probably sucks.
Campus progress has a report on the status of the grad student strike at NYU which has garnered no news attention, hardly any sympathy and, therefore, probably isn't going so well.