I[/PLAIN] [Broken] saw this referenced in a blog last week and thought it worthy of sharing. http://astrog80.astro.cf.ac.uk/Planck/Chromoscope/ It's built off of Chromoscope, an app for visualizing the sky in a range of wavelengths, but it uses Planck data. It shows the CMB, skymaps of all the observed frequencies, dust and dust polarization maps, the visible sky, and more. There are also a number of overlays that help visualize the relationships between the various data. Also, all of the code and image tiles can be downloaded and setup to run on a local server or as a standalone application. And it can be somewhat customized.