I expect that the push will be done by about 3pm PDT.
This opens the doors for the Android team to resume development of CTS and of the developer tools directly in the Android Open-Source Project.
The matching proprietary files will be available at https://code.google.com/android/nexus/drivers.html by the end of day (PDT). You should note that files related to CDMA devices (Nexus S 4G, CDMA/LTE Xoom, CDMA/LTE Galaxy Nexus) have not been tested in the context of AOSP. Of course, consumer support for those devices continues unchanged.
I do not know the schedule for deployment to consumer devices, especially in situations that involve additional per-operator customizations done by the device manufacturers and/or in situations that require operator approval prior to deployment.