Who is Mary Tyler Moore?

"You're paying too much for them. Who is your worm guy?"

I would have loved if the final words of the episode were said by Michael in a voice over though(while video of him putting the watercolor of the building in the wall of the office was shown).

That's what she said :P

You jump to the right and you shake a hand
Then you jumpy to the left and you shake that hand
Meet new friends
Tie some yarn
And that’s how you do the Scarn

The finale episode is 1 year after the previous episode. So according to the storyline Michael had left Scranton 3 years ago. So there is enough time for Michael and Holly to have one or more babies, considering they were already in love and would have likely married soon after Michael reached Colorado.

Beer. Beets. Battlestar Galactica.