Carnival of the Arid #2, the blog carnival about deserts, is up on Coyote Crossing.
Related to lack of water is, well, lack of water and how it affects people, leads to wars over water, etc. So for the World Water Day on March 22, the blogosphere will write about transboundary water. Send your entries to Daniel for this one-off carnival (or is this more properly called Synchroblogging?).