an LLM from any ABA approved law school will suffice, which is all of them in the top 100 or so. it doesn't have to be from a school in NY (HLS is not in NY btw!) - unless you have an english LLB, in which case you don't even need the LLM - but it's recommended.

There are people who take the NY Bar even without an LLM.

You want this document, from the American Bar Association (it's a PDF):

http://www.abanet.org/legaled/publications/compguide2005/chart10.pdf"
Comprehensive Guide to Bar Admissions, Chart 10 - Foreign Law School Graduates

The main page, with more details, is here: http://www.abanet.org/legaled/baradmissions/basicoverview.html"here

Hope this helps.