Well, earlier posts about the cross member going up proved to be false -- it was Tower #3 getting a new box added. I think that Tower #3 will be raised to the height of Towers #4-6, then the cross-member added.
More exciting, the BIG crane was moved into place, and used to pick T3's box into place. The smaller one was moved off (it appears) well down Perimeter Road. I'd guess they'll use it to build other parts of the ride now -- that HUGE tower supporting the first turn comes to mind.