Looks like the viral marketing campaigning for Halo 3 has started. Take a look at http://www.ifpv.com/. On the surface, it looks like nothing really. Just a blank webpage with a big graphic in the middle, like a company logo of some sort. Dig a bit deeper an you’ll uncover a bit more. From the Digg article: Here
“Weird webpage with seemingly no point. Check the page source and add /3.html to the end of the URL and check out that page as well.”