I think it belongs in "Audio Theory, Setup, and Chat". This will attract other potential particants that frequent that thread.
Be advised that there is already a similar thread here: http://www.avsforum.com/t/1435060/rew-measurements-for-room-correction-systems-ypao-arc-audyssey-etc#post_22515128. Maybe we should simply shift our conversations over there?
And then there is the thread I started late last year: http://www.avsforum.com/t/1432713/using-waterfall-and-etc-graphs-to-analyze-room-response#post_22469414. Some good explanations of ETC and Waterfalls are already in this thread.
^^ I saw that first one when I searched for REW & Audyssey a few days ago. That wouldn't be a bad place, but can you add an FAQ at the top through the mods? Otherwise a separate thread might not be a bad idea (although whomever creates the FAQ can link to it by their signature).
From a quick look, other than you and markus, it mostly seems to be Anthem & Sherwood/Trinnov users posting.