Im not sure if this was answered earlier, but what does dragonzkiller mean when he said "I will update CM7 when CyanogenMod finally says it's RC1"
From what I understand, he is doing a code-merge with the official CM7 based. Currently, the official CM7 is in a RC mode. They are getting ready to release a new version of CM7 and I believe once that is done, DZK is going to merge the fixes they have in it with his. It will bring his code closer to the official CM7 release, but it won't ever be an "official" release since Cyanogen doesn't support the Tegra 2 devices apparently.
He's just trying to get his code base closer to what the official CM7 is. That's at least what he tweeted to me about a week or two ago.