Jonathan's Space Report (http://www.planet4589.org/jsr.html) is an exhaustive accounting of human activity in space (manned or unmanned), with a focus on recent launches. Released every few weeks. Back issues run to 1989 and continue to the present day.

Emily Lakdawalla writes some very good explanations of space science for the Planetary Society - very accessible, but with more detail and intelligence (IMHO) than you get from other media outlets. http://www.planetary.org/blogs/emily-lakdawalla/