I love the pendants offered by PrettyWhimsical, particularly the Twilight inspired ones!
The apple pendant pictured above caught my eye first. I think this one is really cool with the red apple against the black lettering and background. Its the perfect font match to the Twilight Saga cover fonts.
You can find this and other fun Twilight pendants at PrettyWhimsical for $6.95 (plus shipping). And don't forget the snake chain for just $5.