Slipknot have teamed up with this tiny upstart social network called Facebook to allow you to "Slipknotify" yourself with their masks in the Facebook camera. You can see what you would look like wearing one of the new Slipknot masks.
The band made the announcement via (duh) Facebook video:
You can enable the filter by clicking on this link on any mobile device with Facebook installed. You can take a photo of yourself, or even find some photos of people like James Hetfield and Kerry King and see what they look like with Slipknot masks on.
Slipknot's We Are Not Your Kind comes out August 9th.
Update: Guns N Roses also released Facebook filters.
[Thanks for the tip, Merl]