  I describe some phenomenological contexts in which it is possible to
investigate effects induced by (string-motivated) canonical noncommutative
spacetime. Due to the peculiar structure of the theory the usual criteria
adopted for the choice of experimental contexts in which to test a theory may
not be applicable here; care is required in taking into account the effects of
IR/UV mixing. This invites one to consider contexts involving particles of
relatively high energies, like high-energy cosmic rays and certain high-energy
gamma rays observed from distant astrophysical sources.
