According to the Broadcast Law Blog, the FCC released an order listing various vacant FM channels. Although the channels are not newly allotted, they had previously been awarded to applicants who either did not pay the amount they bid in the auction, or who received a CP and then did not construct the station.
It has been more than two years since the last window allowing applicants to file for new FM stations. There had been some speculation that the number of requests for new allotments was decreasing, leaving the FCC with few FM channels to auction off and thereby breaking what had been an almost yearly start of a new FCC auction for new FM channels.
When will the channels be available? Read more here.