We have launched a wiki site for sharing information about the UCSC Genome Browser and its data. The wiki—at: http://genomewiki.ucsc.edu—provides an informal forum for our browser users, mirror sites and staff to discuss topics of interest in the genome biology field and exchange usage tips, scripts, programs and notes about mirroring the Genome Browser and working with the Genome Browser source. As with most wiki sites, general users are welcome to edit and add pages after logging in.