Most of you have already completed this task by entering in either Matthew or Abaddon for Clue 4. Some of you were getting stuck on Clue 4's password and sent me messages, so I decided to post some a screencap of what it should look like once you find the Oceanic Hotline clue for Season 4.
Also, there is some interesting info about Abaddon on Wiki. Thanks to those of you who posted the link: http://en.wikipedia.org/wiki/Abaddon
Once you complete the tasks you should be at this point in your progress window and it seems like we will get another video and a couple of more emails when the story continues.