Last night, we first reported that Android 4.2.2 was on its way to some Galaxy Nexus and Nexus 7 devices. This morning it started making it's way to more of those devices and the Nexus 10. Still nothing on the Nexus 4, unfortunately. We also grabbed the OTA links for the Galaxy Nexus, Nexus 7 and Nexus 10 so you could install the update manually.
Now it appears that the Android 4.2.2 update is pushing to AOSP as we speak. It's build number JDQ39 and is using the tag android-4.2.2_r1 in AOSP. Here are a few of the updated directories:
There are many more that have been updated. The push to AOSP just got started this morning, so it's likely we'll see more changes before all the code is placed in AOSP. We'll also see a post from Jean-Baptiste Queru (or as we usually refer to him, JBQ) in the Android Building Google Group. Once all the code is put into AOSP, we'll be able to find a changelog, and once we do. We'll be sure to share it with everyone.
So far some of the changes we've seen is that the Bluetooth streaming bug is fixed. There's a new countdown in the notification for downloading apps from the Play Store, which I posted a screenshot on Google+. It also seems to have fixed that nasty Wi-Fi bug that was plaguing so many people. Or at least it's fixed it on my Nexus 7. Also, long-pressing on the Wi-Fi and Bluetooth icons in quick settings brings up the toggle to toggle them on/off. Which is a nice improvement over Android 4.2.1. And best of all, the lag is gone from the Nexus 7. It's now blazing fast like it should be.
You should start to see Android 4.2.2 getting incorporated into custom ROMs later this week. CyanogenMod probably won't get it until Thursday's nightly. If you've gotten the update, let us know what other changes you've noticed in the comments below.