Here's a hilarious independent short at AtomFilms called New Boobs. The film is almost completely dialogue-free, which is pretty cool. Through expression and physical comedy the actress (Zoe Lister-Jones) manages to completely convey both the protagonist's interest in her handsome neighbor and her neurotic fear that her breasts are too small for his tastes.
I found the movie linked at the Female Transformation Blog - there's a bunch of links in the post for breast enlargement enthusiasts. And really, who doesn't like a nice, swelling set of sweater puppies?