I got tracking on it today and all of a sudden, roughly twenty minutes ago, a return to sender notice was initiated by Google.
"The shipper has requested a Delivery Intercept for this package. / Return to sender pending."
Has his happened to anyone else? I'm going to call Google to see if I can get an update.
Edit: I got a tracking number Saturday morning and it finally updated today to show its location. I'm on the phone with Google Play to see what's up.
Edit 2: Called Google twice. The first representative forwarded the issue to a specialist and I'll get an e-mail back within 24h-28h. I called them back again to see if a different rep knew something or I'd get a different answer. No dice.
Edit 3: I still haven't received an update from Google although I see some posters have been getting e-mails from support vaguely implying some sort of delay or error. http://www.droid-life.com/2013/06/04...order-is-fine/
At least one poster in the thread received an 8gb model via UPS today, so it's only the 16gb model affected by the issue.
16gb model still appears out of stock on the US Google Play site as of this update.