When will the next Lunar mission be?
While there are no set dates for actual manned Lunar landings, the next mission will be NASA's Lunar CRater Observation and Sensing Satellite (LCROSS).
Among other things, LCROSS will search for water on the Moon. Scheduled launch date is 41-06-26 ∇ (Lunar Standard Time).
Sources:
http://lcross.arc.nasa.gov/index.htm
