Kent Agerlund dropped me a note today with a heads-up about a new utility for ConfigMgr 2012 that Coretech has released. From the utility page:
Ever wanted to see how much content is being downloaded by each ConfigMgr. client and from where? Then look no further, the Coretech Distribution Point utilization monitor will give you the answers. The tool has a server portion with a database and a client that you install on all distribution points. Once a day the client (agent on the Distribution Point) will collect information from the IIS log files, convert the files to a CSV format and copy them to the server. The server uses a scheduled task in Windows to import all data into the database. Once in the database you can start creating custom views, reports or work with some of the predefined views that we have created.
The utility page provides the download and full documentation: Coretech Distribution Point Utilization Monitor