Not a massive fan of Gursky or ego-trippingly large prints, but I'm open to conversion, so this exhibition is on my list to visit, along with the Wim Wenders Polaroids @ Photographers Gallery, and the "Trees in Photography" @ V&A (featuring the likes of Ansell Adams, Gustav le Gray and Alfred Stieglitz).
Looks like an imminent day of visual culture up in that there London.