Useful Sources of Desert Information

Desert USA - an EXCELLENT USA desert reference
Descriptions of plants, animals, geology; lots of desert articles, ancient and recent history.
Maturango Museum in Ridgecrest, CA - Upper Mohave Desert Information.
Desert Tortoise Natural Area
Desert Protective Council
Darwin, California (near Death Valley)
Living Desert (Palm Springs, California)
Center for Biological Diversity
CDCA Center for Biological Diversity's California Desert Conservation Area
Desert Trail Association
Basin and Range Watch
BLM
Glen Canyon Institute
SUWA Southern Utah Wilderness Alliance
Arizona-Sonora Desert Museum (Tucson, Arizona)
National Parks Service
NPCA National Parks and Conservation Association
Friends of Nevada Wilderness
Wilderness Society
Mojave National Preserve Conservancy
Sierra Club
Eastern Mojave Geology - A Botanist's View (Really nice field notes and photos)
Desert Environmental Issues, Wilderness, CA, NV, AK (Bob Ellis Earthlink Website)
Desert Wilderness.net (Desert Environmental Issues, CA NV) 
Oregon Natural Desert Association
Wilderness Watch (monitors Wilderness Areas - Western states)
Risking Too Far - Bob Davis' website (Writing and photos of desert hiking and camping)
Postholer.co/Colter - Buck Nelson's journal of his 2012 solo, Desert Trail through-hike
A Guide to Hiking Around Phoenix, AZ (Info on day hikes in Phoenix and links for novice desert hikers)