Google Synonym Operator

Aaron Writes:

"Today, Google introduced a new advanced search feature that enables users to search not only for a particular keyword, but also for its synonyms. This is accomplished by placing a ~ character directly in front of the keyword in the search box."

Of course, I had to test this new feature out, so I did a few searches and the new operator did pretty well. It replaced 'RDF' and 'XML' for 'RSS' which is fine and it replaced the word 'libraries' with 'archive'. How exciting!!