I'd be willing to work on this on a volunteer basis.
I developed http://toolserver.org/~emw/wikistats/, a page view analysis tool that incorporates lots of features that have been requested of Henrik's tool. The main bottleneck has been that, like MZMcBride mentions, an underlying database of page view data is unavailable. Henrik's JSON API has limitations probably tied to the underlying data model. The fact that there aren't any other such API's is arguably the bigger problem.
I wrote down some initial thoughts on how this data reliability, and WMF's page view data services generally, could be improved at http://en.wikipedia.org/w/index.php?title=User_talk:Emw&oldid=442596566#.... I've also drafted more specific implementation plans. These plans assume that I would be working with the basic data in Domas's archives. There is still a lot of untapped information in that data -- e.g. hourly views -- and potential for mashups with categories, automated inference of trend causes, etc. If more detailed (but still anonymized) OWA data were available, however, that would obviously open up the potential for much richer APIs and analysis.
Getting the archived page view data into a database seems very doable. This data seems like it would be useful even if there were OWA data available, since that OWA data wouldn't cover 12/2007 through 2009. As I see it, the main thing needed from WMF would be storage space on a publicly-available server. Then, optionally, maybe some funds for the cost of cloud services to process and compress the data, and put it into a database. Input and advice would be invaluable, too.
Eric