As soon as CM7 is finished and everything is working, I will be crackin' the mopho wide open and flashin'.
I'm in the same boat as you. My MoPho is rooted but my bootloader is still locked. I wanted to wait for CM7 (or something similar) to come out before unlocking my bootloader and losing 4G. I did read though that there was a way to get 4G back but I wasn't sure if it was ROM specific or not.