I have ordered two Nexus 4's this year, once in Feb and once mid June. Both went through with minimum hassle. As far as I can tell, UPS handles the entire logistics including warehousing and dispatching at their Kentucky facility.

Can you check if the item you ordered is "in stock" right now on the play store? I noticed the Nexus 4 8GB White is "no longer for sale". Is that what you ordered? Another thing to check is if the charge has hit your credit card. If it has, then the package should be dispatched.