Now that I have finally mastered the art of adding ringtones to my iPhone, I'm looking for some fun ideas for ringtones. For a while I went with the 24 "CTU" ringtone, and that was fine until EVERYONE started using it. Now I cringe when I hear it. I then went with "Battle Without Honor" (you may know it as the awesome O-ren Ishi walking music from Kill Bill). It's getting old. I need some new ideas. Songs are okay, but I'd rather go with something fun. Sound effects, pop culture references...what are you using?