Cooking: SuperCook.com
SuperCook.com looks like it could be a new favorite site for me. The concept is simple. Look around the kitchen and add ingredients to the page supercook will scour the web and find recipes given the ingredients.
I couldn't resist seeing what was available for sardines. I can honestly say I had never considered frying sardines in beer-batter, but most things in beer batter are good, so why not sardines.

The site also provides a tag cloud right below the ingredients you've entered showing the their relative occurence in the available recipes.
While I'm certain that I would be the only one in my house eating sardines in any form, you can't deny the utility of having a site that searches based on what you have available.