My 4S is closing in on two years so I'm definitely in. I'm already planning my spiel for the boss to let me off a few hours early. With this this much notice I bet he'll let me slip out in time to get in line by 4AM. If it pans out this will be my first iDay waiting in line.
It'll be like the "old days" when we all had to wait in line if we wanted the new iPhone. You'll get to actually talk to people you've never met before one-on-one. It can actually be a pretty cool experience if you're an outgoing, gregarious sort.
I'm in the same boat. I bought a 5 in October. AT&T says Sept. 2014 for full and doesn't mention partial. Apple.com (with AT&T acct. info) said Oct. 25th for partial last time I checked a couple weeks ago. That was for a 5 since the 5S wasn't listed yet.
We both got Verizon phones on launch day, but then decided to return them later and stick with AT&T. I had to wait a couple weeks for my AT&T 5 since they were backordered. He walked in and got a 64 GB that was in stock.