Offseason Update 13
In Walkabout, when Claire is holding the memorial service she mentions someone and says they were sitting in seat 23C.
In Born To Run, Kate has a license plate from Ohio. Ohio has a total area of 116,096 km's squared. The total sum of all the numbers in 116,096 equals 23. [Thank you NinjaDude]
In Born To Run when the camera focuses on Joanna's passport we see 42. [Thank you Amos]
In Walkabout, when Claire is holding the memorial service she mentions that one couple had overdue video charges for the movies Willy Wonka and The Little Princess. Willy Wonka was written by Roald Dahl, who was born in 1916 and died on November 23, 1990.