My upgrade is right on December 1st.
That gives LG and XDA one month after release to find a way to unlock the bootloader/get Cyanogen mod working.
Being able to stay up to date via ROMs is incredibly important to me, and the only thing holding me back from the at&t version is an uncertain future in regards to custom ROMs.
My captivate had identical hardware to the nexus S and if the Optimus G mirrors the Nexus 4 in that manner it will be bar none the best deal on at&t.
If it fails to get unlocked bootloaders, then it will pretty much fall off and never be heard from again after an update or two max.
Sent form my Xarmor U9BL using My Fingers!