For those of you that can't wait.
Taken from XDA (thanks and full credit to xyzulu and coolfrooddude for links and instructions)
Download file directly from Google (for the paranoid, like me)
http://android.clients.google.com/p...c0.signed-sojus-GRJ90-from-GRJ22.39fe4c59.zip
Install instructions (use the file you downloaded above, not the one in the instructions)
http://www.androidcentral.com/how-manually-update-your-nexus-s-android-233
At your own risk.
Latest from Engadget
Sprint announcement
http://www.androidcentral.com/nexus-s-4g-grj90-ota-might-be-coming-july-11
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