Back when the iPhone 4 came out, I called Radio Shack out of desperation. The guy took my name and said he'd put me on his list. I called back a couple of days after launch and was told they don't maintain any kind of "list".
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B179 Safari/7534.48.3)
I called two Best Buys in my area; one told me there would most likely be preorders, but had yet to receive anything official; the other told me here would not be preorders, and if there were, it would be online only. Because of the differing reports, I emailed corporate last night; haven't gotten a reply yet.