I had read about this last night. They're launching a "Lunar Crater Observation and Sensing Satellite" (otherwise known as LCROSS, acronyms are so much fun). They're going to launch two parts of the LCROSS at the moon at approximately 6,000 miles per hour, sending up 6.2 mile high plumes of moon dust. First it will drop the booster rocket, blasting a hole about 90 feet deep. After the LCROSS brown townyzes that plume, it will launch itself at the moon, creating a second 60 foot deep hole.
Isn't science fun?