Why wouldn't this be a great place to discuss AGI?

Because LW has been around for 5 or so years, and I've remember seeing very little nuts and bolts AI discussion at the level of, say, Starglider's AI Mini-FAQ happen here, very few discussion about deep technical details of something like IBM's recent AI work, whatever goes on at DeepMind and things like that. Of course there are going to be trade secrets involved, but beyond pretty much just AIXI, I don't even see much ambient awareness about whatever publicly known technical methods there are that the companies are probably basing their stuff on. It's as if the industry was busy fielding automobiles, biplanes and tanks while the majority at LW still had trouble figuring out the basic concepts of steam power.

LW can discuss the philosophy part, but I don't see much capability around that could go actually look through Goertzel's design and go "this thing looks like a non-starter because recognized technical problem X", "this thing resembles successful design Y, it's probably worth studying more closely" or "this thing has a really novel and interesting attack for known technical problem Z, even if the rest is junk that part definitely needs close studying" for instance. And I don't think the philosophy is going to stay afloat for very long if it's practitioners aren't able to follow the technical details of what people are actually doing in the domain they'd like to philosophize about.