Here goes...got my iPhone 3G last Tuesday. Restored to 2.1. Jailbroke it. Used Gevey to unlock and I was in business.
Hated the lag while posting on forums such as this. Hated the battery life. (Almost depleted at a rate 2x as fast as my old 1st gen)
Did the update to 2.2 safely using the new Pwnage tool. After 2 full charge/usage cycles, take a nice look at that battery life. This was just taken a few mins ago.
As you can see, I've done a nice share of talking. Not too much EDGE usage but I did do A LOT of wifi surfing (more than 2 hours consecutively) yesterday. Most while simultaneously chatting away on the phone
All I have to say is my battery life doubled. There was no way I would have pulled this off last week.
Those of you on the fence wondering if battery life is an issue with a jailbroken 2.2 iPhone...need not worry. It is safe to update
Wifi on 85% of the time
Brightness about 40% (Auto off)
Bluetooth off for this full charge cycle
If you have battery life info and pics you'd like to share, please do so. I'd like to see what other people are getting whether you're jailbroken or not
Thanks in advance