On Feb 11th 2013 the Landsat Data Continuity Mission launches Landsat 8!! This is a hugely important launch as it effectively means that there will be a Landsat archive of comparable imagery running from the 1970s up to the present day. A launch party kit is available here. Landsat 5 was a lifeline after Landsat 6 failed to become functional and Landsat 7 has not been without its hiccups. My fingers are crossed that LDCM/Landsat 8 gets up there safely, gets on-line and starts providing many more amazing images.