A lot of that going around, whether its paid-to-hack or a worm or what its hard to tell. But a few weeks ago on irc there was easily half a dozen people within a couple of days who had javascript redirect hacks, usually from having an iframe inserted somewhere. Some changed all links on the site to point to porn/spam sites, some were a bit messy and only caught the admin user, who got porn instead of the admin pages.Yup, it's called a JavaScript redirect - tells the browser to do something automatically.