I have this working (in skeleton form). Anybody interested?

  bean :id=>:one, :class=>:NamedBean do
    set :name, "first"
  end

  bean :id=>:nv, :class=>:NameValueBean do 
    set :name, "nv"
    set :value, :one, :local
  end

  bean :id=>"sb-with-string", :class=>:ScoreBean do
    constructor 15
  end