Recently (or last week), I visited the water exibit at the Museum of Natural History with some fellow Treehuggers, as well as other people who decided to tag along. For someone who had been to the museum far too much, I thought it was great: there were loads of facts with brilliant visuals, though many who find the act of reading taxing may not think the same. See it before it closes in May. Water is becoming an increasingly important/urgent issue, so it’s great if you inform yourself on the topic.
In the near future, I will be looking for a water related charity (clean water in developing coutries, etc) to donate to. If anyone has suggestions, please leave them in your comments.
http://www.amnh.org/exhibitions/water/
http://hosted.ap.org/dynamic/stories/W/WORLD_FORUM_WATER_SCARCITY?SITE=NVREN&SECTION=HOME&TEMPLATE=DEFAULT

Regarding the charity, you might want to check out Water for People. http://www.waterforpeople.org. -Donna