I've also noticed that the media usually states that ‘improving relations with the SSPX’ is the only reason why Pope Benedict widened the availability of Mass according to the Latin Missale Romanum of 1962. Also, news reports just surfaced claiming that the SSPX is anti-Semitic: this at the same time as the rumor about the excommunications started. Connect the dots.
The restoration of the Liturgy has an importance far exceeding good relations with the SSPX, although the Society certainly got the ball rolling decades ago. Read the Spirit of the Liturgy by Joseph Ratzinger for more details.
UPDATED - excommunications lifted: click here for notice (in Italian).