As our use of microarrays extended to an increasing number of experimental systems, we quickly found ourselves having to cope with an avalanche of data. To manage the huge amounts of information generated from multiple array experiments, our bioinformatics group, then headed by Jeff Furlong, developed a custom gene expression database, called Expression Array Manager [7] . In addition to serving as a central data repository, Expression Array Manager functions as our laboratory information management system, provides a streamlined data analysis pipeline, and provides a mechanism for publishing our gene expression data to the scientific community (available at http://expression.viromics.washington.edu).