Francis Brown and Rob Ragan have developed a search engine hacking tool arsenal that leverages Google, Bing and Shodan to quickly identify vulnerable systems or sensitive data leaks from corporate networks.
To start all you need to do is go to the link mentioned above and download search diggity from the attack tools menu.
some cool features include PortScan
NotInMyBackyard is becoming one of my favorites, allowing to search for passwords or sensitive information intentionally or recklessly posted on the net. The tool comes with pre-built queries that make it really easy to find information on pastebin, youtube, twitter, dropbox, googledocs and more.
Just try :
type 'password' in the Query appender
select site:s3.amazoneaws.com from the locations list (inside cloud storage).