  We discuss the prospects for observing the characteristic features of the
Efimov effect in a two-component ultracold atomic gas near an interspecies
Feshbach resonance. In the ultracold regime, the Efimov effect is expected to
be manifested in the three-body collision rates through the appearance of
series of minima or maxima as a function of the two-body s-wave scattering
length $a$. Here, we propose the observation of this Efimov physics through
measurements of the inelastic three-body rate constants near a Feshbach
resonance. Our analysis suggests that boson-fermion mixtures, where the bosons
are much heavier than the fermions, are the most favorable system to observe
such features.
