More GR Waves
Lumo has an excellent post on the GR wave discovery. Highly recommended if you want some modestly technical detail.
Here is a quote on the energy release:
Kip Thorne has described the unbelievable power of the black hole merger differently. During the peak power, the black hole merger releases 50 times more watts in gravitational waves than all damn stars in the visible Universe combined. This is just shocking.