  We explore the possibility that weakly interacting dark matter can form bound
states - WIMPonium. Such states are expected in a wide class of models of
particle dark matter, including some limits of the Minimal Supersymmetric
Standard Model. We examine the conditions under which we expect bound states to
occur, and use analogues of NRQCD applied to heavy quarkonia to provide
estimates for their properties, including couplings to the Standard Model. We
further find that it may be possible to produce WIMPonium at the LHC, and
explore the properties of the WIMP that can be inferred from measurements of
the WIMPonium states.
