This site contributed the article on creating propulsion from the Mach Effect, which had information and an interview with Paul March, one of the main Mach Effect researchers.
Southern Fried Science describes how space technology can be used to help the earth and its oceans.
Phil Plait, the creator of Bad Astronomy, is an astronomer, lecturer, and author and worked for ten years working on Hubble Space Telescope. Phil describes the revamped Hubble Telescope and a restored Space Telescope Imaging Spectroscope which he worked on.
Check out the Carnival of Space 120 at Music of the Spheres for a lot more