I posted below about NASA's plans to look for water on the Moon, but it's already been discovered; see here and here. So the debate whether to return to the Moon first or just skip it and go straight to Mars (which I've posted on) just got a little more interesting. This apparently ticked Mars off, so it revealed it has water ice to up the ante.
Unrelated but interesting: the Messenger spacecraft (which I've also posted on) is swinging by Mercury for the last time today before it settles into orbit around it in March 2011.
Update (2 Oct): Mercury pictures.