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[Don Bowen <don.bowen AT earthlink.net>]

Thanks for the response.  From that and my research I seem to be getting 
the idea.  Here are my first thoughts.

The angle of repose of the existing slope varies between 45 and 50 degrees 
and is 4' at the highest point.  Code does not require heavy footing or 
permits for a wall 3' or less.  Existing drainage carries water away from 
the top of the slope.  The completed wall will be about 18" - 24" from the 
existing slope top.   A drain tube will be placed at the bottom of the new 
wall.

The slope will be cut back to about the final grade so will act as a form 
for the back of the wall.    The slope will be cut back in a series of 
gentle curves with seats placed about 10' apart.  A footing will be along 
the bottom of the wall with a single rebar the length.  From your email I 
am thinking of the concrete embedded rebar posts.  Two layers of chicken 
wire will be laid against the slope.  Rebar posts will be bent and tied to 
the footing rebar.  Wall height will average less than 2' with a 20' 
section at 3'.  A rebar top rail will be wired in place.  A final two 
layers of chicken wire will be paid in place and concrete pushed into the 
wire.  If I can I will rent a concrete sprayer.

Don Bowen
http://www.braingarage.com