The USGS Land Cover Institute (LCI)
USGS releases 1973-2000 time-series of land-use/land-cover for the conterminous U.S.
Access the publication and data.
USGS LCI Hosts NewGlobal Land Cover Data
Researchers from the University of Arizona recently created MODIS based global land cover datasets. The USGS LCI is hosting these datasets on their behalf to make them more available to the wider research community.
Just released, the latest edition of the nation's most comprehensive look at land-surface conditions from coast to coast shows the extent of land cover types from forests to urban areas.