Sino-Caucasian and Nostratic

What are opinions on this list regarding the proposed Sino-
Caucasian family, or Dene-Caucasian as I believe it is also known.
It seems there is debate as to whether Sumerian and ChukchiKamchatkan
belong with Nostratic or Sino-Caucasian.
Or, could Eurasiatic, Sino-Caucasian (minus Sumerian and
ChukchiKamchatkan), Afro-Asiatic, Kartvellian, Sumerian,
ChukchiKamchatkan and Elamo-Dravidian all be early seperate branches
of SCAN? I wonder where Eskimo-Aleut would fit into all this.

-Michael