This is an amazing tool that is as interesting in it's process as it is in the majestic simplicity in which it performs it's task. Identifont asks you a series of questions about the characteristics of the font you are trying to identify. As you answer the questions more and more fonts are discounted as viable until you get the font of your choice. The most questions I have been asked is 11 but I am sure that the more obscure your font the more questions the tool would require.
This is not only a clever tool for identifying fonts you want to use but it is an insight into how databases use boolean logic in order to perform set tasks. I love this on all fronts!