From:
http://www.nasa.gov/mission_pages/LRO/news/water_search.html

"The spacecraft also has a neutron detector with much better resolution than Lunar Prospector's, called the Lunar Exploration Neutron Detector (LEND). The detector can locate hydrogen deposits to an area about 10 kilometers (about 6.2 miles) across.
...

LRO's Diviner instrument measures temperature. It will be directed at the PSRs to see if they are really cold enough to trap hydrogen or water molecules for billions of years.
...

LRO includes a laser ranging system that will build an elevation map to show the contours of the polar craters.
...

The job of LRO's Lyman Alpha Mapping Project (LAMP) is to see in the dark. It is sensitive enough to make pictures of the crater depths using reflected light from stars and glowing interstellar gas (actually a specific type of ultraviolet light, called Lyman Alpha, which like all ultraviolet light is
invisible to the human eye). Also, any ice on the surface of the PSRs will leave a distinct imprint in the reflected light, definitively revealing its presence.
...

An experimental radio transmitter and receiver on board LRO, called Mini-RF, also could detect ice deposits on the surface and beneath it as well. Ice deposits will change the reflected radio signal in a specific way, revealing their presence.
...

Finally, LRO has a companion spacecraft, called the Lunar Crater Observation and Sensing Satellite (LCROSS), which will be deliberately crashed into a polar crater. The resulting plume of material
from the impact will be observed by LRO and telescopes on Earth for evidence of hydrogen or water.
...

"Multiple instruments and spacecraft are the power of the LRO mission -- we can verify that water
or hydrogen is there with several independent techniques," said Vondrak. "

"Date: April 24 *
Mission: LRO/LCROSS
Launch Vehicle: United Launch Alliance Atlas V
Launch Site: Cape Canaveral Air Force Station - Launch Complex 41
Description: LRO will launch with the objectives to finding safe landing sites, locate potential resources, characterize the radiation environment and test new technology. The Lunar CRater Observing and Sensing Satellite mission is seeking a definitive answer about the presence or absence of water ice in a permanently shadowed crater at either the Moon's North or South Pole."

*means: No Earlier Than (Tentative)
http://www.nasa.gov/missions/highlights/schedule.html

I thought it going launched late 2008, but it looks like earliest is going to be apr 24 '09.
It seems like this is mostly going to be about confirmation, and though the Lunar Exploration Neutron Detector (LEND) is going to have a much higher resolution than the previous mission it's still not going to give much resolution, but it's possible the other instruments might result in giving a higher resolution mapping of water [or H2] deposits.