Verizon Wireless has yet to officially comment, but after several of us have spoken to reps in-store and over the phone, there is no plans of a direct way of preordering (to my knowledge only Best Buys were given this option, but have since ended it).
It should be available in-stores on July 15th, from releases in the past, I'd suspect doors to open at 7am (EST). Now as far as online ordering is concerned I can honestly say I have no idea. I believe in the past, online orders have begun to start between 12am-3am EST online, but again there has been no confirmation on these windows, and probably won't be until the release day draws closer.