NOAA's LDART Page .. This is the most straightforward place to find LIDAR data readily available for downloading, but in keeping with NOAA's mission, the focus is heavily on data from states that have at least some coastline. Scroll down a bit on this page to see list of states represented. http://maps.csc.noaa.gov/TCM/
CLICK (USGS) .. The USGS Center for LIDAR Information Coordination and Knowledge (CLICK); see their Data Viewer tab http://lidar.cr.usgs.gov/
NOAA's State Projects Page .. Select states of interest in the "Projects in My State" pull-down menu to ferret out clues about which state agencies *might* have data that they *might* be willing to share with you http://www.csc.noaa.gov/
USGS Seamless Data Distribution Service .. This is increasingly the main (federal) repository for LiDAR info, but using the application takes patience. http://seamless.usgs.gov/
OpenTopography Data, DEMs, and some tools; not that much data yet, but seems to have the right ideas and has received NSF $ to beef up http://www.opentopography.org/
LiDAR Data Portal Over 1 million sq km of already-collected LiDAR data and derived information, either free or for sale at nominal cost http://www.redarrowmaps.com/lidarportal/
USDA Data Gateway .. Although bulk of data is NAIP imagery, some LiDAR-based elevation info is here; see Get Data button http://datagateway.nrcs.usda.gov/
Puget Sound LIDAR Consortium Folks interested in Western Washington state can get LIDAR data here from this productive consortium http://pugetsoundlidar.ess.washington.edu/
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