LBL servers are down today. If you’ve been trying to use VISTA (the comparative genomics tools) , you will get a “server not found” error. We’ve contacted someone over there and were informed they were having hardware issues. The site will be available within a day or so.
In the meant time, you can view VISTA enhancers at the UCSC Genome Browser
UPDATE (by Mary, Tuesday morning ET): Site appears to be back up for me http://genome.lbl.gov/vista/index.shtml Go compare sequences! Or browse enhancers!