The baby photos are the actual baby photos of most of the cast.
When Jim is walking out of the office building you can see the stroller that the office workers bought for Jan abandoned.
Near the end the episode, while Jim and Pam are conversing over the phone between Scranton and New York, the camera zooms in and visibly shows Jim's name plate reading Assistant Regional Manager. There was a running gag throughout the years with Dwight Schrute being Assistant (to the) Regional Manager to Michael Scott.