Cabeus A is the target...

crater at the lunar south pole for the LCROSS impact scheduled for 9 October. Here's why:

"LCROSS will search for ice by plunging its spent upper-stage Centaur rocket into the permanent shadows of Cabeus A, where water might be trapped in frozen form. The LCROSS satellite will then fly into the plume of debris kicked up by the impact and measure the properties of the plume before it also collides with the lunar surface."

Previous related post that provides background on the LCROSS mission.