Wordspy is a useful website for language lovers - it's a site dedicated to tracking new words and phrases and their meanings. According to the website, they track "new terms that have appeared multiple times in newspapers, magazines, books, Web sites, and other recorded sources." For example, the top new term today is listed as:
Cyber Monday n. The Monday after the U.S. Thanksgiving holiday, when online retailers reportedly experience a surge in purchases.
The entry also includes citations for use of the term and the earliest usage of the term.
Hat tip to beSpacific.