Fr. Z. is reporting that ACSA has an article reporting a rumor that their will be a three year trial period associated with the Motu Proprio Summorum Pontificum.
Just a rumor at this point, so don't panic. We will know for sure in 48hrs.
Update: This turned out to have no basis. The Bishops are asked to bring up any serious issues in 3 years to see what can be done.