At 3:56 p.m. today, House Speaker Nancy Pelosi announced that the Employee Free Choice Act (HR 800) has passed the U.S. House of Representatives. 

Senator Edward Kennedy indicated today that he would introduce the measure in the Senate "soon."

According to an AP report:

The celebrations may be short-lived. Senate Republican leader Mitch McConnell, R-Ky., has pledged to block the bill in the Senate, and the White House says the president will veto the bill if it reaches his desk.

The House vote was short of the two-thirds majority that would be needed to overturn a veto.