Hi, I am one of the authors of the MeeGo policy system and currently trying to do something similar @Intel. The original MeeGo policy system was used in Nokia products (in N900 and in the currently shipping N9). In MeeGo we had a policy decision daemon that communicated its routing, corking and muting decisions to a pulseaudio module that did enforce the decisions. MeeGo had its own policy module in pulseaudio which you can see in the MeeGo gitorious archive if you were interested.
