The Maxim magazine photo shoot that Rachel does in this episode is an actual shoot. On stands on the week of Oct 14th 2006, there is a cover with Hilarie Burton (Peyton), Sophia Bush (Brooke) and Danneel Harris (Rachel). What Rachel wore for the photo shoot session is the same outfit that the girls wore for the actual front cover spread.
Danneel Harris, Elisabeth Harnois, and Matt Barr all starred in the 2007 movie 10 Inch Hero.
Karen is making coffee and asks Dan if he'd like some, however in episode 4.01 she told him that she was giving up coffee while she was pregnant.