The release date for the first of the 3 Modules is April 23, the town square module which features many of the Social features of Identity. The town square module will be available to people who pledge 30 or more dollars. If you want to find more info about the release of the town square you can find it here.
This Developer blog does not have the correct date though it was change to April 23 on March 2 Of 2018. If you want to find out more about the date change and other things check here
Have a good one, - ShiftDed