http://pastebin.com/ceWGKZjJ , now you just need to firebug a Facebook page so you can figure out what those element IDs do...
At a quick glance, I'd say ErrantX is correct.
How'd you do that?
I pasted your script into Eclipse (new JS source file), Source -> Format to make it readable. Then I took the big array that's assigned to _0x82af , pasted it into Firebug, bam, normalized strings. After that it was just plain find/replace. The first few lines came from the part before eval(.
Just to confirm; yes this is similar code to what I've seen before - it does send the page as suggestions to your friends. (basically it is a JavaScript virus)
If it works like the others do: it sends a request to your friends to add the group/page etc. (this could be different, I haven't had a close look, but it is what others did)