Branes of codimension two and greater are typically singular at the level of general relativity when their backreaction is included. As a result the cosmology and dynamics of these branes are relatively poorly understood. Recent interest in codimension two branes has arisen from their role in the 'Supersymmetric Large Extra Dimensions' scenario which has been suggested to alleviate the cosmological constant problem. I will discuss various approaches to dealing with the dynamics of these branes and their various pitfalls and suggest how one can resolve these issues in the context of effective field theory. I will concentrate on a specific calculation of gravitational waves in a 6d braneworld which illustrates many of these issues.