  We demonstrate enhanced wave-like character of diffuse photon density waves
(DPDW) in an amplifying random medium. The amplifying nature makes it
contingent to choose the wave solution that grows inside the amplifying medium,
and has a propagation vector pointing opposite to the growth direction. This
results in negative refraction of the DPDW at an absorbing-amplifying random
medium interface as well as the possibility of supporting "anti"-surface-like
modes at the interface. A slab of amplifying random medium sandwiched between
two absorbing random media supports waveguide resonances that can be utilized
to extend the imaging capabilities of DPDW.
