Thank you to all of the artists who made their work available via flickr.
I have used the following images under the creative commons commercial license with attribution:
Attribution-ShareAlike 2.0 Generic (CC BY-SA 2.0)
The following list of images fulfills the attribution section of the license. Thank you to each artist / photographer.
Photographer: The Zender Agenda Alterations: cropped
Photographer: Jason Kasper Alterations: cropped
Photographer: Photo Cindy Alterations: cropped
Photographer: James Mackintosh Alterations: cropped
Photographer: Feast of Music Alterations: cropped
Photographer: Vincent van der Heijden Alterations: cropped