Social networks are a great help for this kind of news: a new paper by a FB friend does not go unnoticed (at least by me) as it once would. I learned today that Garrett Lisi (picture below), the surfer and theoretical physicist, has deposited another paper in the Cornell arxiv. And it looks as a significant addition to his previous studies of the E8 group. He explicitly calls it "a companion" to the
previous article, "An Exceptionally Simple Theory of Everything".