  Observations using the Spitzer Space Telescope provided the first detections
of photons from extrasolar planets. Spitzer observations are allowing us to
infer the temperature structure, composition, and dynamics of exoplanet
atmospheres. The Spitzer studies extend from many hot Jupiters, to the hot
Neptune orbiting GJ436. Here I review the current status of Spitzer secondary
eclipse observations, and summarize the results from the viewpoint of what is
robust, what needs more work, and what the observations are telling us about
the physical nature of exoplanet atmospheres.
