  We study direct and indirect detection possibilities of neutralino dark
matter produced non-thermally by e.g. the decay of long-lived particles, as is
easily implemented in the case of anomaly or mirage mediation models. In this
scenario, large self-annihilation cross sections are required to account for
the present dark matter abundance, and it leads to significant enhancement of
the gamma-ray signature from the Galactic Center and the positron flux from the
dark matter annihilation. It is found that GLAST and PAMELA will find the
signal or give tight constraints on such nonthermal production scenarios of
neutralino dark matter.
