Abstract: A Tambara functor is ring-like structure, where in addition to addition and multiplication we have both additive and multiplicative norms (or transfers) for subgroups of a given finite group G; more formally, they can be defined as certain product-preserving functors out of a (2,1)-category of bispans of finite G-sets. Tambara functors often show up as equivariant analogues of commutative rings - for example, the 0th homotopy group of a genuine commutative equivariant ring spectrum is a Tambara functor. In this talk I will discuss a description of the ?-category of connective commutative equivariant ring spectra as Tambara functors valued in ?-groupoids; this is joint work in progress with Bastiaan Cnossen, Tobias Lenz, and Sil Linskens.