My contribution was the premature report of room temperature superconductors. There is a new class of superconductors made under high pressure which could lead to room temperature superconductors.
Centauri Dreams talks about David Brin's speculation on eleven reasons for no contact with aliens (fermi paradox)
Bad Astronomy has ten things you don't know about the Milky Way galaxy
Out of the Cradle has list of moon related websites
New Frontiers talks about the space elevator
Colony Worlds proposes living inside aquariums and glass instead of underground on Mars.