When will United, others resume Dreamliner flights?

Ethiopian Airlines on Saturday became the first airline to fly paying passengers on the Boeing 787 Dreamliner since the aircraft was grounded by safety regulators in January.
Ethiopian's flight follows a Federal Aviation Administration order from this past Thursday (April 25) that permitted airlines to fly the Dreamliner again as soon as they replace its problematic lithium-ion batteries with an updated battery system. Japan followed suit with a similar move a day later. Most regulators elsewhere followed the lead of their U.S. and Japanese counterparts.
Now industry observers will turn their watch to the other seven airlines that have the 787 in their fleets. http://www.usatoday.com/story/todayinthesky/2013/04/29/when-will-united-others-will-resume-dreamliner-flights/2121841/