Learn how to add royalty-free stock phographs to Google Docs. Stock images are now available in Documents, Presentations and Spreadsheets.
"Google Docs is integrated with Google Image Search to help you quickly find and insert web photographs in your documents. The results are filtered to only show images that have been licensed under Creative Commons and labeled for commercial reuse so you are legally allowed to insert these images in your documents.
Other than Creative Commons, there’s a new image search option available in Google Docs that will help you find professionally shot photographs for your documents.
Google has partnered with stock photography services like Photos.com to offer royalty-free stock images inside Google Docs, just like Microsoft PowerPoint."
Read more about it: http://www.labnol.org/internet/stock-photos-in-google-docs/20562/