"So starting today, you can sign up for a new and expanded field trial that makes it easier to find your stuff across Google, whether you’re searching on Google.com or searching in Gmail.Find your stuff faster in Gmail and Search | Official Gmail Blog
Similarly, when you search on Google.com, your results will include relevant information and messages from Gmail (something familiar to those who joined the original field trial) and now -- new in this field trial -- also files, documents, spreadsheets and more from Google Drive"
Tuesday, October 16, 2012
Find your stuff faster in Gmail and Search | Official Gmail Blog
Evernote Simultaneous Search is another option for having your personal content appear in search results (from Google, Bing, Yahoo, and others); also see Google Amps Up Personal Search to Combine Gmail, Calendar, Drive and More (AllThingsD)