yes.. agreed
but I guess I am not making myself clear. to use his ROM, you must be rooted. but his ability to tweak that official release and even make his ROM I thought also clearly implied that the ability to root is still possible in 2.2 and they did not lock the bootloader, because if they had, he would not have been able to tweak it.
but by your question, I guess that assumption was wrong on my end
and that the only thing it means is that you have to be rooted in 2.1 to load his 2.2 that is based on the "official" release and there is no implication the bootloader was locked down or not just yet.