Meta service discovery is used to find and select a service discovery mechanism by context. As multiple service discovery mechanisms (SDM) proliferate across various administrative domains, mobile devices will require a way to locate and select the appropriate mechanism according to the context of the mobile device, such as network domain, location, protocol, and application. We define Meta Service Discovery and explain the motivation for it. We describe our results in building a Meta Service Discovery capability on three existing DHTs and integrated into a new broadcast-oriented SDM. Finally, we analyze the sizing and distribution of DHT entries, including hash distribution of SDM entries according to a geographic population-density scheme.