It seemed clear to me that it needed an Interface Builder equivalent, but Atlas was in perpetual beta and ignored for years, motorola bought them and the 280 north guys went to "hot" startups.
I was really interested in Cappuccino for quite awhile, still would be if it could deliver a working system that was in reasonably good shape. (I'm not saying it can't, but it's apparently being abandoned years ago made me believe I shouldn't invest time into it.)