  We open the discussion into how the Laser Interferometer Space Antenna (LISA)
observations of supermassive black-hole (SMBH) mergers (in the mass range
~10^6-10^8 Msun) may be complementary to pulsar timing-based gravitational wave
searches. We consider the toy model of determining pulsar distances by
exploiting the fact that LISA SMBH inspiral observations can place tight
parameter constraints on the signal present in pulsar timing observations. We
also suggest, as a future path of research, the use of LISA ring-down
observations from the most massive (>~ a few 10^7 Msun) black-hole mergers, for
which the inspiral stage will lie outside the LISA band, as both a trigger and
constraint on searches within pulsar timing data for the inspiral stage of the
merger.
