I contributed my discussion about bootstrapping ground launch of magnetic sails and some discussion about the need for high volume applications and the plans of Burt Rutan and SpaceshipTwo/SpaceshipThree and spaceshipFour
The Space cynic does not believe that Burt Rutan can hit his goals for space tourism.
Centauri Dreams talks about new details about the solar wind and mentions proposed ideas for riding the solar wind
Colony worlds talks about the usefulness of Lagrange points
Hobbyspace looks at Spacehabs efforts to capture the next round of NASA COTS business (Commercial Orbital Transportation Services)
Universe Today talks about Europa oceans and if they are thick or thin and if there is life on the bottom of them