In recent days, art-world voyeurs have been checking the site damienhirst.com to spot the famed contemporary artist at work. Since Mr. Hirst launched his new website, featuring a live feed from his studio in Gloucestershire, England, he has appeared on screen at least once. It's easier to get a view of his assistants toiling over a work made of scalpel blades and black paint. Here's a look at some other artists' websites worth a visit.