To make my job for guessing what will happen on the season finale easier, and for those of ya'll who want to do the same. Spoilers from OfficeTally, and some from the episodes themselves. Obviously, I can't verify if all of these are true, but...
- the season finale is called "Goodbye, Toby"
- Ryan has a grudge against Jim because Jim talked to David Wallace about the failures of Dunder-Mifflin Infinity, and because Wallace seems to like Jim better; it looks like Ryan's trying to get Jim fired. Toby is letting Ryan get away with threatening and warning Jim, and putting him on probation, probably because of his creepy crush on Pam.
- Pam learned that the best introductory graphic design programs were in New York and Philadelphia
- Toby announced that he is moving to Costa Rica
- Jan and Michael broke up, and Michael is now "looking for love"
- Andy Buckley (David Wallace) expected to be called back for at least one post-strike episode (we haven't seen him yet)
- Dwight enters a management training program
- Dwight sues some kids in small claims court over "agricultural disputes"
- Dwight goes on a few dates
- Rashida Jones has an agreement that allows her to come back for post-strike one episode, if the producers want her there (we haven't seen her yet)
- someone leaves D-M at the end of the season
- ...and it's not Pam or Michael
- ...and the Dwight/Michael relationship has been called "too important" to let Dwight leave
- ...and John Krasinski said he's not leaving the show, and Kate Flannery said it wasn't him either
- there's apparently a "nice cliffhanger"
- Jim and Pam either get engaged, elope, or have sex
- Jim and Pam do not break up
- at least one scene was filmed in front of a green screen
- an Office couple will get engaged
- Amy Ryan plays the new HR woman, Holly
- Michael is instantly enamored with Holly
- there may be three plot twists that profoundly impact Angela, Dwight, Andy, Jan, Toby, Michael, Jim, and Pam. These plot twists, if they exist, will include three of the following: an engagement, a pregnancy, a death, an infidelity, a fire (confusing wording...is this fire as in, you know, with flames and stuff, or fire as in a firing?), and a coming out.
- Mose may appear again
- Angela and Phyllis have a little war over Toby's goodbye party, which Andy plays a part in, in some way
- Jan is coming back
- Roy is not coming back
- Michael throws a huge party for Toby leaving to celebrate "the joy in his heart"
- Dwight and Meredith "haze" Holly
- Kevin is involved in the hazing of Holly, though he doesn't know it
- Kevin is "on the prowl" in the finale
- a Dunder-Mifflin lady is pregnant
- Ryan gets in trouble with the law, but "not for the reason you think"
- apparently, according to Steve Carell, "Ed Helms full frontal" ;)
(Edited 5/15 to put this entry on top. That's what she said.)