We've added NOOKcolor support just choose it in the device list., we've still got some tweaks to make as the files are significantly larger than the standard files(adding color support when we don't need it) but it works for Approach Plates, Airport Directories and Books. In the text option box you must set the setting for use publishers settings to on for them to display correctly.
We'll get a video on Youtube this weekend of how it works.
With some caveats, even downloading from the web browser on the device works fine.
(We'll be adding a direct NOOKcolor link like we have for Kindle and iPad soon)