  We review the connection between noncommutative field theories and gravity.
When the noncommutativity is induced by the Moyal product we can use the
Seiberg-Witten map in order to deal with ordinary fields. We then show that the
effect of the noncommutativity is the same as a field dependent gravitational
background. The gravitational background is that of a gravitational plane wave
and the coupling is charge dependent. Uncharged fields couple more strongly
than the charged ones. Deviations from the usual dispersion relations are
discussed and we show that they are also charge dependent.
