I've heard about that theory too, about the real top secret stuff being moved out to places like Dugway or White Sands, and can understand the reasoning behind that theory. However, the very latest satellite imagery of groom and lake and even the newest pics from Tikaboo suggest that Groom Lake is going to be active as it ever was with the latest expansion of the base. For starters this includes a new 183'x345' hangar at the south of the base, next to the old SR-71 hangars, as well as the re-surfacing of the west side of the north ramp, where the Red Hat hangars at situated. Also, due to the presence of an F/A-18 on the imagery, it tells us that not only are the USAF there, also the USN or USMC are there, probably the USN, as they have been involved in projects there for many years. An expansion to the PE (Personal Equipment; pilot ready room) also coincides with activity at Groom Lake increasing. Another sign of expansion is in the re-surfacing of the south ramp and the addition of fuel tanks in 2003. I think it could be safe to say that Groom Lake could well be hotting up again. From the guys at dreamlandresort, they paid for their own satellite imagery quite recently, and using the google earth imagery overlay they have at their site, you can easily see the new additions to the base.