EB2 is current for all countries except for India and China. EB2 cutoff date for India and China have advanced to 01 October 2003 from January 1, 2000.
In general EB2 requires labor certification, and it is usually done by a sponsoring company. However if you self-petition for an EB2 in the NIW category, you can request to do without the labor certification process. Therefore EB2-NIW applications may not contain a 750B form (actually the new form is ETA9089 instead of 750). You can attach a filled 9089 along with the i-140 packet. In this case you sign the form (not the employer).
Several people in the past have obtained their approvals without 9089 form. However a few USCIS examiners may send an rfe requesting for a filled 9089 form. So it does not hurt to include one.