BoingBoing reader davidsongray visited Biosphere 2 recently, and took some photos of the site. Today, Biosphere 2 is owned by the University of Arizona. It's also being used for scientific research projects, including the Landscape Evolution Observatory, which will study the natural cycles of carbon, water, and energy, and how those cycles are affected by climate change and by natural systems like vegetation and microbes. The LEO experiments are being constructed in Biosphere 2 right now. That picture above shows the construction site set up in Biosphere 2's old agricultural area.
Some of the niftiest shots davidsongray took are from the living areas of Biosphere 2, which I don't remember having ever seen before.
Oh, and this isn't something where you need to know a guy to get in. Tours are $20 a ticket.