The International Space Exploration Coordination Group (ISECG) is a forum of 14 most advanced government space agencies - ASI (Italy), CNES (France), CNSA (China), CSA (Canada), CSIRO (Australia), DLR (Germany), ESA (European Space Agency), ISRO (India), JAXA (Japan), KARI (Republic of Korea), NASA (United States of America), NSAU (Ukraine), Roscosmos (Russia), UKSA (United Kingdom). Its main goal is to advance a long-range human space exploration strategy.
On August, 2013 12 ISECG member agencies (including NASA) released the most recent update to the Global Exploration Roadmap. The summary can be seen in this infographic:
On April 10-11, 2014 NASA plans to host a workshop to discuss the updates to this roadmap.
Hope, the private pioneers like SpaceX, Mars One and others will speed up those plans a bit!