I agree with Ever Onward. I don't think Aaron is one of the 'Oceanic 6'. Or at least I sure hope not.
So, Locke is going batsh*t insane. Putting a live grenade in Miles' mouth and leaving him there alone...I guess it is not that much worse that when Sayid tortured Sawyer for the location of the guns, but still. He seems rather immature and unhinged right now. Other people know more than him about the island and events surrounding it, and he can't stand it.
In the beginning Locke pulled out Valis by Philip K. **** for Ben to read, then told him he should read it twice because maybe there is something that he missed. I haven't read Valis yet (I'm going to pick it up today), but I just finished Ubik by Philip K. **** last week. In that book everyone is 'half dead' and hooked up to a life support machine where they all interact with eachother in another reality/world, kind of like Joekerr's VR theory. Don't know what Valis is about yet, but I'll find out. Maybe the writers of lost are telling the viewers to watch lost again because there is something that we have all missed...or something in Valis...hmmmm....