Based on data from the Spitzer Space Telescope, this digital rendering of HD80606B, which has a very highly eccentric, comet-like orbit around its parent star, is the most accurate image of an exoplanet yet. Video of that orbit has also found its way to YouTube. More about his image can be found at the outstanding blog Centauri Dreams.
NASA/JPL-Caltech/G. Laughlin (UCO/Lick Observatory)