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?