NetNews Tracker personalized netnews delivery service What does this service do? It searches Usenet newsgroups daily for the phrases you choose, and sends e-mail notification when there are new hits. What's it cost? Up to three search phrases are free.
Google Alert lets you track anything on the Web that shows up in Google's search. Simply enter keywords or phrases you want to track on the site (after going through the simple, free Google Alert registration process).