  Dark matter which interacts through a magnetic or electric dipole moment is
an interesting possibility which may help to resolve the discrepancy between
the DAMA annual modulation signal and the null results of other searches. In
this article we examine relic density and collider constraints on such dark
matter, and find that for couplings needed to explain DAMA, the thermal relic
density is generically in the right ballpark to account for cosmological
measurements. Collider constraints are relevant for light WIMPs, but less
constraining that direct searches for masses above about 10 GeV.
