A few other spacecraft notes from memory:
The old JEO is dead as doornail. JPL is now pushing a split mission with a separate Europa orbiter and (Juipter-orbiting) Europa-flyby spacecraft. The flyby vehicle has imagers and radar with much less rad-hardening than for an orbiter. Because of this, the split mission is, in theory, much cheaper than a full-up JEO. Also, it gives the option of just flying the flyby vehicle, which could be attempted for a New Frontiers proposal.
There were several posters about the complex orbital dynamics of missions to NEOs; suffice to say, it's really tricky. The co-rotation synchronous orbital distances are typically right above the surface, so it may be simpler to "hover" there with a spacecraft, and then slowly move along lines of gravitational equipotential.
There is a considerable amount of disagreement about the spectra of Phobos, which fits either chondritic asteroid or Martian phylosllicates. Phobos-Grunt (AKA Phobos-Soil, it depends who you ask) will launch soon and should help answer this.
There were three posters for Electric Solar Wind Sails ( http://www.electric-sailing.fi
). Sounds like a neat idea, and deserves more attention.