  We consider the idea of combining the supersymmetry breaking and messenger
sectors in models of gauge-mediated supersymmetry breaking. We discuss the
advantages and problems of such models, and present an existence proof by
constructing an explicit example. We explore in some detail the low-energy
supersymmetry-breaking dynamics and the generation of supersymmetry-breaking
soft masses of the standard model superpartners, and discuss many features
which are likely to be shared by more realistic models with dynamical
messengers.
