Thank you. Hope ETA750B is still accepted.

I did some research, it seems that ETA750B is still required for NIW.
http://uscis.gov/graphics/howdoi/eligibility2.htm

If you are a worker with exceptional ability in the sciences, arts, or business, you may apply to waive the requirement that you have a job offer if such a waiver would be in the national interest. To apply for a national interest waiver, you must submit Department of Labor Form ETA-750B.