I found this article awhile ago while I was checking tasteologie out at work.
Some of the foods listed are pretty out there, but some are just like meh.
I feel like nowadays it's harder to find foods that will gross anyone out because now we're all desensitized by television, especially since the dawn of Andrew Zimmerman's Bizzare Foods (but I'm not a fan of the way he describes the tastes or textures).
anyway here's the article:
...mmm...fish sperm sack....