With the release of the Nexus 9 — now available online from Google Play or in Best Buy retail stores — we knew Google would likely begin pushing out Android 5.0 Lollipop to AOSP today. Sure enough, they have.
Still hitting AOSP as we type this, the source code still isn’t fully available (these things take time), but you can already find repositories for the Nexus Player (ASUS Fugu) as well as the Nexus 6, Nexus 7 WiFi, Nexus 9 and we’re sure the rest of the Nexus family not too long after.
Currently, Android 5.0 Lollipop is only being referred to as “lollipop-release” with build LRX21M under platform build, but once everything is officially updated we should see that generic name changed to android-5.0_r1. Once everything is finished, expect your favorite Android developers to dive in and begin building updated Lollipop ROMs directly from source.