Yes, I was searching for this option too. I liked to use the 2G network for extensive phone conversations etc... My battery drains quickly if I use the 3G network for basic tasks. I'm not sure if they will add it.I don't know why it was removed to begin with. Also, was this feature available to Verizon iPhone 4 users?
This is interesting. I've got ios5 gm on my 4 and it's there (and use it). I assume it still works on edge?