Galactoseismology in the GAIA Era
  The GAIA satellite will provide unprecedented phase-space information for our
Galaxy and enable a new era of Galactic dynamics. We may soon see successful
realizations of Galactoseismology, i.e., inferring the characteristics of the
Galactic potential and sub-structure from a dynamical analysis of observed
perturbations in the gas or stellar disk of the Milky Way. Here, we argue that
to maximally take advantage of the GAIA data and other complementary surveys,
it is necessary to build comprehensive models for both the stars and the gas.
We outline several key morphological puzzles of the Galactic disk and proposed
solutions that may soon be tested.
