  Analysis of the longterm photometric variability of 7 Be/X-ray-pulsar systems
in the Small Magellanic Cloud has been carried out. We find a variety of types
of variability are present, including: longterm irregular changes, periodic
orbital outbursts due to interaction between the stars (weeks to months),
low-amplitude quasi-periodic variations of the equatorial disk (days), and
nonradial pulsations of the Be primary star (hours). This is the first time
nonradial pulsations have been identified in Be/X-ray binaries, although they
were previously known in some single Be stars.
