At one point during the auction, there is an extra that makes a bid and raises his hand. This is the same guy that had Michael steal food from his plate at Benihanas. He also comes out of the elevator outside of the office in another episode.
While speaking privately to Phyllis, Dwight mentions Angela's affinity for Sheetz. Sheetz is an actual set of convenience stores located throughout the Pennsylvania area and headquartered in Altoona, PA. Other scripts translate this line as Angela introducing Dwight to (bed) sheets. She introduced me to so many things. "Pasteurized milk, sheets, monotheism, presents on your birthday, preventative medicine."
The "Bruce Springsteen" song Michael enters the auction to is actually "The Heart of Rock and Roll" by Huey Lewis and the News. It's from their album Sports released in 1983. The album is 7x Platinum and has done nearly 10 million in sales since release.