I was hoping that someone out there knew something I didn't on this, because that was the conclusion I came to in my research, that nobody even has a conceptual stack.
That said, I think OpenCOG has the closest to something of a larger conceptual stack in mind based on the atom-space approach. I think the folks over at Deep Mind might have some thoughts, and perhaps the numenta people as well.
Their system is I think an AGI as in artificial general intelligence system though not at human levels yet (apart from playing Breakout and Space Invaders). Here's Demis Hassabis talking about it https://www.youtube.com/watch?v=0X-NdPtFKq0&feature=youtu.be...
That said, I think OpenCOG has the closest to something of a larger conceptual stack in mind based on the atom-space approach. I think the folks over at Deep Mind might have some thoughts, and perhaps the numenta people as well.