  Radio pulsars are fascinating and extremely useful objects. Despite our
on-going difficulties in understanding the details of their emission physics,
they can be used as precise cosmic clocks in a wide-range of experiments -- in
particular for probing gravitational physics. While the reader should consult
the contributions to these proceedings to learn more about this exciting field
of discovering, exploiting and understanding pulsars, we will concentrate here
on on the usage of pulsars as gravity labs.
