My San Francisco arrived yesterday, my first android phone. It took a couple of seconds to unlock but now I am using it on 3.
I was going to flash it to Jellyfish, but after reading some of the posts I am now not so sure. I am worried about battery life. I have looked at a comparison of 2.1 and 2.2 but I would be interested to know what people think is the big attraction for upgrading to 2.2?
I have rooted the phone and if nothing else will remove all the Orange stuff.
If you have rooted then you can try different ROMs. Downloading from MoDaCo I have used Paul's MCR 2.1 r4 (Eclair), then FLB r2 (FroYo), then Paul's 2.2 MCR r11 and I just went back to FLB 2.2 on Sunday which is currently at r8a. I have found the FLB 2.2 ROMs slightly better on battery than Paul's 2.2. However it is that long since I had 2.1 on the phone I can't remember what the battery life was. 2.2 does make the Blade much smoother than 2.1 (and particularly stock 2.1). Try the FLB r8a and see what you think but remember you can always go back.
I have not used the JJ ROMs but decided against this route on Sunday as the JJ ROMs are no longer being developed.