Peyton's ring tone is "High School Is Such a Serious Thing" a song used in a One Tree Hill parody on Family Guy (1999).
When Dan is meeting with his doctor the doctor mentions that the first person on the donor list is a reverend from the same town. This is a huge violation of medical privacy laws and would never actually happen. And the fact that the number one recipient out of all of America is in the same town is nearly impossible.