Jeffrey K. Bedrick - http://www.jeffreykbedrick.com/ 

Grants general permission online but it was not clear to me if he allowed tubing, so I emailed him and he granted us permission to do so. (Tubing allowed) 

Besides inserting the proper credit on everything we do with his work, he also requires that we give give proper credit to the image itself by inserting the name of the image on all tag, tube or whatever else we make.  Make sure you visit his site and read complete TOU 

This is what he has on his site.

Q. May I use your images to decorate my personal web site, to make stationary, or other graphic use?

A. I allow use of my work on non-commercial websites with the condition that each image is properly credited with the correct title and my name or banner linked back to my site. If you can meet these conditions then you may use my work in the manner you requested.

For use of my work in any commercial enterprise, I must charge a licensing fee in an amount commensurate with the usage.

.

 

CnS requires that you always insert artist ©name & artist url on all tags, tubes etc...