Semantic Search - Faceted Search and Web 3.0 for Drupal

Yum.

Faceted search, javascript, and recipes.

http://www.supercook.com/

"Supercook is a new recipe search engine that finds recipes you can make with the ingredients you have at home. To begin, simply start adding ingredients you have. The more ingredients you add, the better the results will be."

This is an excellent example of what Semantic Search is currently capable of.