Excerpt from the site: "The Allen Brain Atlas (ABA) is an interactive, genome-wide image database of gene expression in the mouse brain. A combination of RNA in situ hybridization data, detailed Reference Atlases and informatics analysis tools are integrated to provide a searchable digital atlas of gene expression. Together, these resources present a comprehensive online platform for exploration of the brain at the cellular and molecular level."
Wired reports: "Scientists have mapped every gene in the mouse brain as part of Paul Allen's Brain Atlas project launched in 2001. While brain maps until now have been similar to a traditional encyclopedia, the Allen Brain Atlas is more like Google Earth."