Planetary Exploration

This is a long and perhaps rather convoluted read, but it's worth checking out:

Planetary Mission Concept Studies.

This is all stuff NASA is considering doing and it includes the first proper mission to Neptune, a mission to work out if there has ever been life on Ceres (which would also cover stuff we need to know if it does end up the refueling station for the Belt), dropping a lander on Mercury, and Enceladus (I've talked to NASA scientists who would much rather send a mission to Enceladus, with its convenient off-gassing, than Europa).

Excited? Some of these will be a decade in the making (the next feasible launch window to Neptune, barring a major propulsion milestone, is in 2029), but...