Austodesk has release the 2nd update for Revit 2011. Contrarty to intuition, this can be found under the product download section, rather than the update section for Revit Architecture on the Autodesk site.

At the same time Autodesk has released the latest Subscription Advantage Pack for Revit 2011, including a new type of server for central files, a conceptual energy analysis tool and a set of extensions. I am now downloading all that and will report on my progress later.