OMG! This is tomorrow! International Observe the Moon Night comes for the very first time September 18, 2010! It's being organized by a coalition of space science and astronomy organizations including Lunar Reconnaissance Orbiter Education and Public Outreach, the NASA Lunar Science Institute, the Lunar and Planetary Institute, and Astronomers Without Borders.
The idea, obviously, is for everyone to observe the moon over the course of the evening, all over the world. It's a rolling event of course because we live on a spinning planet and you can't always see the moon; it's also only a quarter or so full, so it'll set before the night is over. But that means the terminator will be visible (that's the line that divides night and day on the moon, not Arnold Schwarzenegger) and seeing the terminator should mean dramatic views of lunar mountains you wouldn't normally see.
Individuals and groups are hosting events all over the world. Check this map to find one near you. Happy moon-watching!