OFFICIAL UPDATE FROM FACEBOOK @ 7:07 p.m.: "We're currently investigating issues that are causing some applications on Facebook to not load. This issue is not specific to games. We expect to have this fixed shortly and I will update you when the matter is solved."
If you want to get your FarmVille fix -- head to farmville.com
If you need your Mafia Wars fix -- head to mafiawars.com
Facebook seems to be having a massive game outage this afternoon -- instead of loading, all games come up as a blank page. We also found these notifications from Zynga and Playdom below.
Still need to get your FarmVille fix? Looks like FarmVille.com is still up and running. We've contacted both Zynga and Facebook for more information. Stay tuned.
UPDATE: From FishVille moderator MerMolly: "Facebook is having some problems today loading your games. Please do not worry, we will make sure your fish are kept fed and well taken care of until the issue is resolved."
UPDATE: From Pet Society official forums