Lyman-alpha Forest Tomography of the z>2 Cosmic Web
  The hydrogen Ly$\alpha$ forest is an important probe of the $z>2$ Universe
that is otherwise challenging to observe with galaxy redshift surveys, but this
technique has traditionally been limited to 1D studies in front of bright
quasars. However, by pushing to faint magnitudes ($g>23$) with 8-10m large
telescopes it becomes possible to exploit the high area density of
high-redshift star-forming galaxies to create 3D tomographic maps of
large-scale structure in the foreground. I describe the first pilot
observations using this technique, as well discuss future surveys and the
resulting science possibilities for galaxy evolution and cosmology.
