The sorority Alpha Omega Pi is actually based on UC Berkeley's Alpha Omicron Pi sorority. The writer Adam Larson Broder lived next door to their house when he went to college there.
When Kent Woodlands is playing in his tennis match against Arizona State, his score is announced first when he is receiving serve (ex. 15-Love). The server's score is always announced first in tennis, thus it should be announced Love-15, etc.
When Carolyn is taking thing out of her medicine cabinet, she clears the bottom shelf, save for the NyQuil bottle on the left. When the bottom shelf gets a close up seconds later, the NyQuil bottle is there with a few other bottles.
As Carolyn is leaving town towards the end of the movie, she sees Kent and waves to him. As she does this the same building goes by in the background twice.