Aside from the case issue, are you guys seeing significant battery life improvement with the extended battery. Wife and I just got ours Monday and I am really surprised at just how short the battery life is with the stock one. I did a factory reset(trying to solve the wifi issue) on my phone last night. So far today, seems battery is lasting a bit longer.(wifi still won't connect though). I consider us somewhat light users, certainly not power users. My wife plays some simple games and has many alarms set. I just normally check emails and tweets, battery was only lasting about 5 hours until I was in the red.
Did you turn off the Global Roaming and set it to CDMA only?? The phone comes with GSM turned on (Verizon shouldn't do this) and that uses up the battery searching for a signal it will never find.