The part I loved was Jim and Pam messing with Dwight in IM and then at the end Pam feels sorry for Dwight so she sends him the you are the better being IM. So she's still messing with him, but she felt sorry for him at the same time so she tried to cheer him up.
I just loved the looks on Dwights face when he read the messages, looking up at the ceiling for a camera or something, was just hilarious.
The wife and I have seen, maybe, 20 episodes of The Office. The scenes you refer to are the first time we've laughed out loud -- like real guffaw and not some uneasy kind of, "Oh, man, if that were real that'd be a billion dollar lawsuit" chuckle. We were disappointed they didn't drain all the good stuff out of that one, but I understand they had another great storyline going on with the Angela/Andy/Dwight love triangle.
Angela is my new favorite character because she reminds me of a lot of the people I'm working with these days. It's funny because it's true.
I liked the fact they made Ryan look like a major dweeb. I've always hated that guy.