In a previous thread, I mentioned a way that I accomplish what your asking in a law office setting:
http://forums.omnigroup.com/showthread.php?t=8416
Essentially, sometimes I use contexts as super-tags where I define contexts in terms of what task I am performing for the client. Thus, in the context view, I can sort by context and get a report of all of the hard due dates that are typical in my practice. I still use contexts in my personal life in the more traditional GTD fashion, but for managing my docket, expanding the use of contexts has allowed me to get the type of report you are looking for.
Incidentally, the next version of OF will have a metadata field that will allow more flexibility to narrow search results by action.