The Vasari team have just released a brand new Dynamo as a WIP. This looks extremely exciting and after attending Matts class at RTCUSA, this is really pushing the boundaries of what Revit and Vasari can do. There are installers for Vasari and Revit as well as lots of examples on the Autodesk labs site, check the link below.
Key new features include:
User Interface -- side panel to allow you to search and then drag and drop new nodes in to place
User-created nodes – you can make 'sub-nodes' and then reference them elsewhere, these act like writing a reusable function in a programming language
Python Scripting node
Math, logic and other nodes – many new nodes added to support evaluation, iteration and looping