Best method; Multiplayer server browser/lobby?

I've made a couple of multiplayer protoypes / failgames in unity before but they have all involved pain painstakingly swapping long numbers (GUIDs) with players in order to join servers, I was wondering what you guys think is the best way to implement a multiplayer server browser or matchmaker in unity3d?

The only way I can think of doing it would be by using unity's php execution stuff to write new servers to an SQL database and have those servers listed when players view the 'server browser' But that seems unnecessarily complex, and relies on using an externally hosted database when I guess it should be possible for each unity client to get this info another way? or not?