I also have yet to hear from NYU, and I'm also waiting on University of Colorado Boulder. I definitely agree that NYU is being a bit rude about it all. I've tried to follow up and the grad secretary has given me the standard response that decisions are still being made, they will let us know as soon as they can, etc.. doubtful though. Colorado I think just moves on its own time..
I'm mostly committed to UVA as well after a great trip down there last weekend (so hello future classmates!), but I still feel strange making the final decision without knowing.