You can get more details here and/or here.

Facebook has filed a major lawsuit accusing 25 different domain name holders of being in violation of the Lanham Act. The majority of the domain names are typos/variations of Facebook.com. ElliotsBlog.com has the full copy of the lawsuit here (PDF).

Given their previous success in this arena, the outcome is likely a win for Facebook. There are 104 domain names in question but here are 12 of my favorites: