For the original Secret Santa: Kelly got Oscar a shower radio, Oscar got Creed a shamrock keychain, Creed gave Jim an old shirt, Jim got Pam a teapot with sentimental gifts inside, Pam got Meredith a picture of the office, Meredith got Dwight four shot glasses, Dwight got Phyllis 200 paintball pellets with 2 free lessons with himself, Phyllis knitted Michael an oven mitt, Michael got Ryan a video iPod, Ryan got Toby a book of short stories, Toby got Angela a poster of babies posing as adults, Angela got Stanley a picture frame and Stanley got Kelly a "Kelly" nameplate. Kevin got a foot spa for himself, having drawn his own name.
On the Office Ladies Podcast, hosted by Jenna Fischer (Pam) and Angela Kinsey (Angela), John Krasinski (Jim) was a guest and revealed he took the teapot from the set to keep once the show had ended.
When Packer shows up, he says he needs a drink. Michael states that Toby is coming with one. In the background we see Toby carrying bottles of vodka, but instead of stopping, he continues off screen. Toby is actually trying to uphold his HR duties by keeping the alcohol away from the already drunk Packer.
Phyllis's boyfriend (Bob Vance of Vance Refrigeration) works on the same floor as she does, in fact when Michael steps out of the office after getting her Christmas gift, you can clearly see Bob's office.
Pam says her family calls the gift stealing game "White Elephant." At 14:04 in there is a printout of an elephant on white paper on the column to the right of Stanley (left side of screen).