  I provide an observational review of the properties of starburst-driven
galactic superwinds, focusing mainly on recent results pertinent to the
transport of metals and energy into the IGM. Absorption-line studies are
providing rich kinematic information on both neutral and ionized gas in
superwinds, with observed mass flow rates similar to the star formation rate
and outflow velocities comparable to or greater than the escape velocity. FUSE
observations of the Ovi doublet provide previously unattainable information
regarding outflow velocities and radiative cooling rates in hot gas at T \sim
3\times 10^{5} K. Emission from gas at temperatures of 10^{4} K and \sim 5
\times 10^{6} K is now being studied with unprecedented spatial resolution
using HST and Chandra, tracing the complex interaction of the still-invisible
wind of SN-ejecta with the ambient ISM entrained into these outflows. I discuss
the implications of these observations for our understanding of
starburst-driven outflows.
