They're not open until 8 tomorrow morning, so calling now will get you nowhere.
if you check the AT&T Pre-Order thread, you'll catch a few people (such as myself) who are still "pending" or "backordered" despite ordering early off the website. it's ridiculous, but it is what it is. I ordered 8:15am CST on 10/7, way before the cut off, yet I have no idea if I have a phone coming tomorrow or not because I have yet to see any update outside of the confirmation email I got 5 minutes after I preordered. best of luck to you, though.