My contribution was my discussion of Virgin Galactic and how NASA should learn some lessons as it makes new plans
Hobby space also talked about spaceshiptwo and white knight two
An interesting aspect is that White Knight Two could be the first stage able to launch a one person module into low earth orbit.
Virgin Galactic has begun studying a SpaceShipFour (SS4) that could serve as a satellite launcher. By 2014 a version of WK2, with its 13,300kg (30,000lb) payload capability, could air launch the two-stage SS4 vehicle. SpaceShipThree would be an orbital version of SS2
Selenian boondocks talks about orbital access methods in multiple parts. The second part of two stage to orbit reusable launch vehicles is here
Centauri Dreams talks about extinction odds and moving into space.