Interesting detail: Yahoo has released its AJAX library under the BSD license. The archive shows some neat examples of JavaScript. There are other AJAX libraries around. Some of them good. Some of them not good enough. Yahoo’s dev. blog can be found right here.
DAWG (as mentioned on the WordFinders page) stands for Directed Acyclic Word Graphs and it’s a data structure that allows for extremely fast word searches. Better yet, the datastructure forms the foundation for many spellcheckers on the market. A good description (and perfect explanation) can be found at Wutkas. Good programmers master algorithms.
Talking about algorithms. Imagine this: get 48 million dollars to develop algorithms!