I give an update on three major exoplanetary science initiatives being
pursued by Australian-based planet-search teams. Further observations from
the Anglo-Australian Planet Search (AAPS) have revealed that some systems
previously thought to contain a single, moderate-eccentricity planet are
better fit by two planets on nearly-circular orbits. We have investigated
apparent single-planet systems to see if the available data can be better
fit by two lower-eccentricity planets. We identify nine promising
candidate systems and perform detailed dynamical tests to confirm the
stability of the potential new multiple-planet systems. In addition to the
AAPS, I describe the Pan-Pacific Planet Search, a radial-velocity survey of
Southern hemisphere evolved, intermediate-mass stars using the 3.9m Anglo-
Australian Telescope. We currently achieve velocity precisions of 3-6 m/s,
and there are several planet candidates emerging as more data are obtained.

I then describe a plan for Minerva: an installation of four 0.7m telescopes
feeding a high-resolution spectrograph, sited at Mt Hopkins in Arizona.
Minerva will give exoplanetary scientists the ability to pursue dedicated
radial-velocity searches for planets orbiting the nearest bright stars. In
addition, a Southern hemisphere Minerva could be used to follow up on
objects of interest from Antarctic telescopes such as the Chinese AST-3. I
will describe the diverse science cases for this highly cost-effective
facility.

Finally, I present results from our recent series of papers in which we
have performed extensive suites of dynamical simulations to test the
veracity of proposed multiple-planet systems. We show that some systems
are strongly constrained by protected low-order resonances, while others
are wildly unstable on short timescales. This work highlights the critical
need to include dynamical stability analysis as an integral part of the
discovery process for candidate multi-planet systems.