I ordered the new iPhone 3G S tonight on the online Apple Store, and I have been assured it will be delivered to me this Friday, saving me annoying waits on the lines that are sure to form first thing in the morning.
My logic for the upgrade is that I've been using the first-generation version of the iPhone and so I'll get all the 3G benefits (e.g., GPS, faster Internet access away from WiFi) in addition to the features on the new model. Plus, the sooner I start a new contract with AT&T--I have seven months left on my current agreement--the sooner it will end. And I am predicting in the summer of 2011 there will be a choice of carriers and, hopefully, the competition will lead to better options and pricing on plans.