I have reserved rooms for the conference at the Club Quarters Downtown, which is NYU's hotel of choice. You are responsible for making your own reservations. Availability is not guaranteed after the deadline. Club Quarters is the place that NYU puts up all of its speakers and guests. The Quarters are a private hotel that is not open to the pubic but rather serves a set of corporate and university clients.
People are usually very happy with the accommodations.
The only downside is that the Quarters are in the Wall Street area and that is a 15 to 20 minute subway or cab ride to campus, and that the neighborhood is very quiet at night. However, it is right on the border of SOHO and closer to the University than the Club Quarters. You can walk to the University in 10 minutes. The walk is very nice.