Another interressing articles on cloudless map on mapbox:
* http://www.wired.com/design/2013/05/a-cloudless-atlas/
* http://www.mapbox.com/blog/improving-mapbox-satellite-by-mak...
Thanks to Landsat 8 new data also no longer suffers from Landsat 7's defunct SLC
Neat to see things like icecaps expanding and retreating.