In a Tale of Two Cities ,when Kate is brought to breakfast they very clearly show a bowl of strawberries.In The Glass Balerina , Sawyer comments that Kate tastes like strawberries.

I think there is a reason they kept bringing them up.

I think one thing they are hinting at is the 1957 movie Wild Strawberries which was directed by Ingman Bergman

The movie is about a medical doctor and professor who is forced by nightmares (daydreams ,hallucinations) ,old age, and impending death to re-evaluate his life.

He is going from Stockholm to Lund to get an honorary degree. Along the way he meets strangers and realatives.In dreams he is confronted with his past .He comes to realize that his choices in the past have created a cold and empty life .In the end he achieves redemption.

To read more about the movie (also known as Smultronstallet) you can go here:
http://www.imdb.com/title/tt0050986/

or here:
http://en.wikipedia.org/wiki/Wild_Strawberries_%28film%29

I thought this sounded alot like what is going on here on the island.Several of the characters have had hallucinations and strange dreams that make them re-evaluate their lives just like in the movie.

Macainickle

I'm not trying to disuade your theory but I did read somewhere that the strawberry line of Sawyer's was a homage to a scene in Buffy (it was written by a Buffy writer) where a "magic" dealer told Willow that "She tasted like strawberries." Not to say that it doesn't have anymore meaning but sometimes it just doesn't.