As mentioned a few weeks ago, the USGS released their new Io controlled basemap on the Planetary Photojournal:

http://photojournal.jpl.nasa.gov/catalog/PIA09257

This product represents several years of work by Tammy Becker, Brent Archinal, Paul Geissler, and others at the USGS in Flagstaff, Arizona, producing the definitive Io map combining Galileo and Voyager data into a single map. Additional versions of this map are now available at http://astrogeology.usgs.gov/Projects/Jupi...ellites/io.html . These include large, TIF, JPEG, and ISIS version of the basemap. The basemap itself comes in different flavors, with Galileo and Voyager merged products, color merged products, and Galileo-only maps to suit your needs.

Good stuff!

I'm not sure if this is the correct thread, but here's a 'blink' animation comparing the USGS Galileo Io map with the New Horizons map by Jason and Phil:

Click to view attachment

Ian.