For as long as I have used Adium, I enjoyed being able to add my Facebook chat account to it so that I can use one central place for all things chat. A few months ago, I logged into my Facebook Account Security screen and noticed there were some logins from an unknown source. So naturally I went in and clicked “End Activity” (big mistake!) turns out that activity was Adium! so thus I permanently locked my self out of being able to log in to Facebook via Adium.. keep in mind that this was using the default Facebook account type in Adium account type list (it has a Facebook chat connect plugin).

Then I started the search online.. looking for a way to remove a device that I accidentally blocked. Turns out, there is no way to do it!! I kept doing my research and then found out today that you can actually add access to Facebook chat using Jabber! Boy was this a life saver! I can now connect again to facebook chat using Adium.
The visual how to:

where you see the words blurred out, you type in your Facebook username. i.e. the one you set up a long time ago at http://www.facebook.com/username