American Rights at Work has an important blog written by Erin Johansson that keeps track of all the latest anti-worker decisions by the pro-corporate Bush National Labor Relations Board. Erin has some very good -- and concise -- discussions of the most recent Board, including the infamous September Massacre cases. Two of those cases dealt with the subject matter of EFCA: card-check recognition. The first, Dana/Metadyne, held that immediately after over 50% of workers signed union cards and were recognized by the company, 30% of workers could petition to have an election to overrule the majority. The second, Wurtland Nursing, held that an employer could decertify a union without a vote upon presentation of a petition by more than 50% of the workers. These two decisions together mean that the NLRB's position on card-check is that it is not dispositive of workers' desire to join a union, but is dispositive of workers' desire to disaffiliate from a union.
For a good primer on the Board's current anti-worker decisions, read Harold Meyerson's recent piece in the Washington Post.