Battery life has been great for me; admittedly I only make/receive a few calls most days and send a handful of text messages, but I also use it as an iPod on the way to and from work (an hour each way) and have it check my email every hour. Wifi is turned on but auto-sleep set to 1 minute (which disables wifi).
Current stats: 5 hours usage, 36 hours on standby and battery capacity is still over half. Seems pretty good to me!
Current stats: 5 hours usage, 36 hours on standby and battery capacity is still over half. Seems pretty good to me!