Sookie was originally played by Alex Borstein, however Alex was unable to get out of a deal from another show. She ended up guest starring as Drella, an employee at the inn, for several episodes.
When Rory is in class, she is surrounded by female classmates that are passing a bottle of nail polish. The girl who looks over Rory's shoulder and sees she is doing her homework is actually Jacqui Maxwell, who also plays Summer, Tristan's girlfriend at Chilton, in later episodes of season 1.
The teacher in Rory's class is actually "crazy Carrie". Luke's sister's (Liz) friend in later episodes. But never is it mentioned that she's a teacher. Even though, in a later episode, she directs the kids musical (Fiddler on the roof) that her daughter is in.
The jeep that Lorelai has is a hard top. In all other episodes she has a soft top.
Lorelai tells Rory it would be better to make a mistake with a man who has a motorcycle. When Christopher first arrives into town, he is on a motorcycle.