Search patents on Google. A paradigm shifter? Maybe. May very well be.
UPDATE: Dennis Crouch explains:
One problem: Google is best at finding the top-twenty references related to your search. Google is much worse at doing exhaustive searches. Thus, if you want to find every patent that mentions a certain term, you will probably not be successful (at this point) with the Google Patent Search. Finally, Google does not yet have a link to the PDF version of the document.